Pa sets out a courting candle outside their home, determined to find a respectable husband for Cussy Mary.

Charlie Frazier, drawn by the generous dowry, becomes the only suitor willing to marry blue-skinned Cussy Mary.

Charlie beats and rapes Cussy Mary on their wedding night, then dies of a heart attack.

Cussy Mary uses tansy tea to end her pregnancy and returns to her librarian route with an inherited mule named Junia.

Vester Frazier, Charlie's preacher cousin, ambushes and assaults Cussy Mary alone in the woods on her route.

Cussy Mary delivers books to new patron Jackson Lovett, and they begin bonding over their shared love of reading.

Pa shoots Vester Frazier after finding him in their yard threatening Cussy Mary; Vester dies from his wounds.

Doc blackmails Pa and Cussy Mary, agreeing to stay silent about Vester's death only if Cussy Mary submits to medical tests.

Nuns at a Lexington hospital forcibly restrain, drug, and take biological samples from Cussy Mary against her will.

Doc gives Cussy Mary methylene blue medicine that temporarily turns her skin white.

Cussy Mary discovers Willie Moffit hanging dead from a tree with baby Honey alive in the dirt beneath him.

Angeline Moffit, dying after childbirth, begs Cussy Mary to raise her blue baby Honey, then dies.

Jackson Lovett picks up Cussy Mary's thrown courting candle, proposes marriage, and she accepts.

Miners carry Pa's body home after a mine pillar collapses and kills him.

The sheriff arrests Jackson at their wedding for breaking miscegenation laws; Cussy Mary addresses the crowd about the Blues' sacrifices.

Cussy Mary Carter, a blue-skinned WPA librarian, is forced by her father to marry Charlie Frazier, who beats and rapes her on their wedding night before dying of a heart attack. After recovering and returning to work with her mule Junia, Cussy Mary is assaulted by Charlie's preacher cousin Vester, who is later shot and killed by Pa when he trespasses on their land. Doc blackmails Cussy Mary into painful medical experiments in Lexington, eventually discovering her condition and temporarily turning her skin white with medication. The deaths of the Moffit family lead Cussy Mary to adopt baby Honey, and she agrees to marry patron Jackson Lovett, only for Pa to die in a mine collapse just before the wedding. On their wedding day the sheriff arrests Jackson for breaking miscegenation laws, prompting Cussy Mary to publicly confront the gathered crowd about the sacrifices the Blues have made.

The central story of Cussy Mary's struggles, losses, and hard-won independence.

Pa buries Charlie Frazier in the yard alongside Cussy Mary's courting candle.

Cussy Mary visits Angeline Moffit and her injured, blue-nailed husband Willie for the first time on her library route.

Pa tells Cussy Mary he is attending union meetings, worrying her about violent retaliation from the Company.

Harriett and Eula bar Cussy Mary from the new library bathroom by posting a "No Coloreds" sign.

Cussy Mary and Queenie, a Black librarian, bond at the Library Center over their shared experiences of discrimination.

Cussy Mary reads aloud to a group of hungry schoolchildren; Henry declares he wants to become a librarian.

Loretta Adams accepts Cussy Mary's help washing her eyes and says that skin color, like fabric, does not matter.

Rumors spread about Vester Frazier's disappearance; Pa secretly moves the buried body to avoid drawing attention.

Pa vanishes after union violence; Cussy Mary secretly sends a letter through Queenie searching for news of him.

Cussy Mary receives a coded message from Pa through Queenie, confirming he is alive and will return soon.

Angeline shoots a rattlesnake threatening Cussy Mary on the trail and reports that Willie is recovering from his wound.

Allen Thompson attacks Cussy Mary outside the Pie Bake dance; the sheriff removes him but enforces the "No Coloreds" sign.

Doc provides a large supply of food after the second Lexington tests; Cussy Mary brings it to the hungry schoolchildren.

Cussy Mary stops taking Doc's medicine and vows to herself that being blue must be enough.

Four years after the wedding, Cussy Mary writes to Queenie revealing that Jackson visits secretly from Tennessee and they plan to move to Ohio.

After Charlie Frazier is buried in the yard, Cussy Mary resumes her library route and begins forming bonds with patrons while facing continued discrimination from the white librarians at the Library Center. Pa's growing involvement in the dangerous miners' union runs parallel to Cussy Mary's deepening friendships, including a meaningful connection with Queenie, a Black librarian who faces many of the same prejudices. Vester Frazier's disappearance creates new fears, and Pa's violent vanishing during a union fight nearly breaks Cussy Mary until a coded message confirms he is alive. Angeline Moffit shoots a snake to protect Cussy Mary on the trail, and later Cussy Mary distributes the food and medicine she earned through Doc's tests to those most in need on her route. After briefly turning white and then choosing to stop the medicine, Cussy Mary's story closes with a letter to Queenie revealing that Jackson, forced from Kentucky, still visits secretly while they plan a new life in Ohio.

The community bonds, everyday hardships, and quiet moments that shaped Cussy Mary's world.

Multiple suitors visit one after another but reject Cussy Mary because of her blue skin despite Pa's generous dowry.

Angeline Moffit mentions new patron Jackson Lovett and asks Cussy Mary to pass corn seeds to Doc as payment for a house visit.

Doc refuses to travel to visit the dying Willie Moffit without payment, exposing his mercenary character to Cussy Mary.

Queenie and Cussy Mary bond over their love of words on the trail; Queenie reveals plans to apply for a Philadelphia library position.

Cussy Mary agrees to allow Doc's medical experiments after Pa argues the tests could make her safer in the community.

Cussy Mary and Jackson Lovett discuss Pearl S. Buck's The Good Earth together, deepening their growing romantic bond.

Cussy Mary notices that Henry is suffering from pellagra caused by severe malnutrition during her visit to the school.

R.C. Cole receives a letter rejecting his marriage proposal on his girlfriend's behalf; he decides to abandon his post and go after her.

Doc and Dr. Mills conduct a second, cooperative round of tests in Lexington as Cussy Mary provides her full family history.

Queenie announces she has accepted the Philadelphia librarian assistant position and says a final goodbye to Cussy Mary.

Cussy Mary attends the Fourth of July picnic with newly white skin but is still turned away by the sewing circle women.

Library patron Oren Taft tells Cussy Mary he misses her blue color, saying it always reminded him of Picasso.

Cussy Mary carries baby Honey to Jackson Lovett seeking milk; he agrees to bury both Willie and Angeline Moffit.

Cussy Mary arranges for Loretta Adams to care for Honey each day while she continues her library route.

Devil John publicly warns the sheriff that he is up for election in three weeks, helping to defuse the confrontation at Cussy Mary's wedding.

From the start, Cussy Mary's blue skin renders her unmarriageable, while those around her reveal their prejudices and mercenary natures through decisive choices that shape her fate. The patrons on her route, from Queenie to Jackson Lovett to R.C. Cole, each reflect something true about Cussy Mary's hunger for connection and her growing sense of authority within the community she serves. A second round of cooperative medical tests in Lexington holds promise, but when Cussy Mary attends the Fourth of July picnic with white skin and is still rejected, the randomness and persistence of prejudice becomes impossible to deny. The deaths of the Moffits and Cussy Mary's decision to take in baby Honey mark a profound turning point, as does the quiet community of support that forms around her through Loretta Adams and her gathered patrons. Devil John's defiant warning to the sheriff at the wedding crystallizes how completely Cussy Mary has transformed from isolated outcast to the trusted heart of a loyal community.