Every white person in America walks into the nearest body of water and drowns in a single morning.

Sidney watches her stepfather, mother, and half-brothers walk into a lake and tries to drown herself but floats.

Charlie is freed from prison and begins teaching electrical engineering at Howard University in Washington, D.C.

Sidney calls Charlie for the first time and asks him to drive her south to find white survivors in Alabama.

Charlie arrives at Sidney's gated Wisconsin home and she greets him by aiming a rifle at his face.

At O'Hare Airport, Charlie and Sidney meet cantankerous pilot Sailor, who agrees to fly them south in exchange for gasoline.

Sailor flies Charlie, Sidney, and his child Zu to Mississippi, and the group drives toward the Alabama border.

A school bus of teenagers apprehends Charlie, Sidney, and Zu on the highway and takes them to meet the king.

Charlie and Sidney meet King Hosea and Queen Vivian at their three-story Victorian house in Mobile, Alabama.

In Hosea's garage, Charlie spots a large appliance and realizes it is a powerful radio transmitter.

Hosea reveals to Charlie that turning on the machine channeled collective Black consciousness and triggered the mass drownings.

Charlie gives Sidney Elizabeth's letter and tells her for the first time that Elizabeth falsely accused him of rape.

At Orange Beach, Sidney confronts Agnes at a church revival, defends Charlie, and refuses Agnes's invitation to become a walker.

Driving alone across the country, Sidney reaches the Pacific Ocean and floats while releasing her mother's letter to the current.

During Mardi Gras in Mobile, Charlie powers the machine using the energy of stars and Black life, and the world hears trumpets.

The novel opens with a world-altering mass drowning of white people and follows two characters pulled together by its aftermath. Charlie, freed from a wrongful imprisonment, begins rebuilding his life at Howard University while his estranged daughter Sidney, the only survivor of her white family, seeks refuge among remaining white people in Alabama. Their road trip south forces a confrontation not just with geography but with the lies that kept them apart. In Mobile, Alabama, a model Black society reveals the machine at the heart of the event and forces both characters to reckon with history, identity, and responsibility. Sidney's journey culminates in a raw confrontation with her aunt at Orange Beach, while Charlie's ends with him harnessing the power of darkness and starlight to broadcast Black joy to the entire world.

The headline journey from the event to the machine's triumphant activation.

Elizabeth falsely accuses Charlie of rape after her brother Thomas walks in on them, and Charlie is convicted and imprisoned.

Agnes leaves a note on her gated home telling Sidney that survivors are living in Orange Beach, Alabama.

Charlie stops at a yellow house in Indiana where a woman named Ethel explains why she has been burning the surrounding land.

A Black man wearing a Ku Klux Klan uniform named Little attacks Sidney at Thomas and Agnes's house in Kenosha.

At O'Hare Airport, Sidney breaks down crying that Black people have no legitimate claim to the space and feels like she is in a nightmare.

Zu takes Sidney on a tour of Chicago, where they witness a quinceañera that prompts Zu to share her experiences with gender identity.

Sailor and Charlie gamble at the airport terminal and win over a thousand dollars playing spades together before the flight.

Charlie teaches Sidney to drive on a cleared Alabama highway and she crashes a Nissan into bushes and trees.

Sidney meets Nona in the Victorian house, rejects Nona's offer to call her sister, and calls Mobile's society righteous and fake.

Seraphin places Charlie in a smoke-filled bathtub and guides him to stop fighting his suppressed anger and let it wash over him.

On the school bus to Redemption Farm, Sidney talks with Malcolm, a grieving Shakespearean actor who challenges her view of the pre-event world.

Vivian pushes Hosea to turn on the machine again, but Hosea contests her, saying the machine's power cannot be adjusted.

Tau commandeers a school bus and drives Charlie, Nona, and Zu to Orange Beach to search for the missing Sidney.

At Orange Beach, Agnes tearfully admits she was passing as white and apologizes to Charlie for Thomas's lies.

Charlie climbs a fire escape to the roof of a mural-covered building and determines how to power the machine using starlight and Black life.

Before the event, Elizabeth's false rape accusation destroys Charlie's life and sets the backstory in motion, while Agnes's note about Orange Beach gives Sidney the goal that drives the entire plot. The journey south is filled with charged encounters: a violent ambush in Kenosha, a tense airport breakdown, a joyful Chicago detour with Zu, and a driving lesson that ends in a crash. In Mobile, Charlie undergoes a spiritual cleansing in Seraphin's bathtub, and Sidney's bond with Nona begins to crack her rigid white identity during a trip to Redemption Farm. The final stretch sees a family reunion at Orange Beach go sideways, Tau mounting a rescue mission, and Agnes offering a tearful confession, while Charlie scales a rooftop to crack the mystery of how to power the machine.

The significant scenes and confrontations that shape the road to Mobile and beyond.

In prison, Charlie reads a dictionary defining black as evil and hostile, deepening his inability to form a positive identity.

Driving toward Wisconsin, Charlie compares himself to Christopher Columbus, sensing the vast new possibilities stretching out before Black people.

Vivian leads a small but passionate protest to remove a Confederate statue in Alabama the day before the event occurs.

At Sidney's home, Charlie realizes that Elizabeth never told Sidney the truth about the false rape accusation.

Charlie recalls his mother taking him to a fancy restaurant as a child, where he first understood that being Black meant being cast as the villain.

At the airport, Zu introduces herself to Charlie and Sidney as Sailor's child; Charlie finds he cannot determine Zu's gender.

Hosea watches supply ships arrive in Mobile while his son Herald perfects an electric coating that turns the entire city into a living battery.

On the drive south, Sailor's group passes a crowd listening to a woman recite Bible verses, and Sailor identifies them as walkers.

Sidney feels an immediate and unsettling romantic pull toward Fela the moment the teenagers bring her into Mobile.

Nona shows Sidney her book-filled third-floor room, and Sidney realizes with surprise that she does not hate Nona but wants to be like her.

At a carnival in Mobile, Nona pushes Sidney to dance until Sidney finally gives in and feels a deep sense of collective belonging.

Sidney wakes to a Xhosa smoking ceremony; Nona urges her to stop following what the pre-event world defined as right and wrong.

Herald tells Charlie that all of Black trauma, memory, and sorrow hanging overhead is like a sky full of elephants.

Sidney has a dreamlike vision of an enslaved Black woman in a cotton field who fixes her with a look of terrible sadness.

Seraphin connects Charlie to the voices of his grandmother and mother, who urge the real Charlie to emerge from his darkness.

This pool traces the internal transformations of Charlie and Sidney through the key revelations and emotional breakthroughs that reshape their identities. Charlie begins trapped by a racist definition of Blackness internalized in prison, while Sidney clings so completely to whiteness that she cannot see herself in her own father's face. Encounters along the road—a burning Indiana landscape, walkers preparing to drown, Zu's fluid sense of self—chip away at the certainties both characters carry. In Mobile, a series of turning points accelerate the change: Nona's room becomes a mirror for Sidney's longing, a carnival dance breaks something loose in her, and a dreamlike vision of an enslaved ancestor connects her to a history she has been avoiding. For Charlie, ancestral voices summoned by Seraphin finally call the real version of himself forward, setting the stage for his role as the machine's living source.

The discoveries, awakenings, and emotional shifts that redefine both Charlie and Sidney.