The Deep Sky

Aboard the Phoenix, a spaceship carrying 80 crew members on a one-way voyage to settle a distant world called Planet X, Asuka Hoshino-Silva works as the ship's only Alternate, a crew member with no fixed role who fills in wherever needed. The crew woke 11 months ago from a decade of chemically induced hibernation. Their surroundings are overlaid by DAR (Digitally Augmented Reality), a system powered by implants in each crew member's temples that projects personalized environments over the ship's corridors. Alpha, the ship's omnipresent AI, manages communications and monitors crew health.

When a dark anomaly appears on the hull, Captain Becky McMahon orders Asuka and Kat, an Australian crew member, to investigate via spacewalk. Outside, Kat unclips her safety tether and sprints ahead. When she reaches the site and reports she cannot find the anomaly, an explosion tears through the hull and kills Kat. Asuka hauls herself back to the sealed airlock and loses consciousness. She wakes inside the ship, rescued by Ruth Segal-Brown, a Communications Specialist and her estranged former best friend, who defied orders to retrieve her. Alpha reports that Captain McMahon and Winnie, another Communications Specialist, also died in the blast. The explosion has knocked the Phoenix off course, and if the crew cannot correct trajectory in time, they will miss Planet X and die as resources deplete.

Flashback chapters trace Asuka's past. As a child in California, she and her mother survived a wildfire by treading water in a neighbor's pool. Her family spent two years in a refugee camp before relocating to Japan after the death of Asuka's older brother, Luis, who drowned in a hotel pool while using DAR to simulate zero gravity. Luis's dream of space travel drove Asuka to apply to EvenStar, Linda Trembling's program to train children for the interstellar mission. At EvenStar Academy, Asuka represented Japan and befriended Ruth, a blunt British-Israeli candidate, and Lala Williams, a chess prodigy turned robotics competitor. When crew selections were announced, Ruth was chosen but Asuka was not. Months later, another candidate withdrew, and the Japanese government offered Asuka the seat as the Alternate on the condition she relinquish her U.S. citizenship. She accepted.

On the ship, Acting Captain Ying Yue Li, eight months pregnant with twins, privately asks Asuka to investigate what Mission Control suspects was sabotage. Ying Yue chooses Asuka because her role as Alt lets her move freely without suspicion. Ruth briefs Asuka on alarming news: The United States and China have entered military conflict, and Mission Control has consolidated under U.S. control. A.M., the French Chief Propulsion Officer and newly appointed First Vice Captain, challenges Ying Yue's authority. Lala reveals a tattoo exposing McMahon as a secret member of the Militia for the American Constitution (MAC), a far-right paramilitary group. Meanwhile, messages from Asuka's mother sit unread; her mother belonged to Save Mother Earth (SME), an environmental activist group that has claimed responsibility for the bombing.

The investigation yields breakthroughs. Asuka discovers explosives inside spare tool kits and, reviewing Kat's suit footage with Chief Engineer Yasemin Dogan (Yaz), realizes the hull anomaly never physically existed; it was a fabricated DAR image designed to lure someone outside. The bomb was concealed in the tool kit Kat carried. Inventory logs from the Bot Shop, the ship's robotics workshop, confirm the bombs were assembled on board. Asuka dusts bomb components for fingerprints, and the prints match Lala, who is confined under suspicion of murder.

Ruth discovers that a virus has infected Alpha, embedded in a letter from a third-grade class. She alerts Asuka by removing her gloves and spelling words on Asuka's hands, bypassing Alpha's surveillance since the AI monitors crew through their smartfabric clothing but cannot detect bare-skin contact. They force Alpha offline with the Captain's override code. Without Alpha, the crew attempts a manual course correction by repositioning rear engines with large bots. The operation partially fails: Engine 3, which Asuka repositioned using a large bot called Petunia, melts down and must be jettisoned. After Alpha is restored, Gabriela Ota, Asuka's bunkmate and a Programmer, fixes Asuka's malfunctioning DAR with an upgrade patch. Asuka notices that all birds have vanished from her DAR environment.

A flashback to the night before launch reveals Asuka's final conversation with her mother, who staged an emergency to lure Asuka home. Her mother told her, "After this, you are not my daughter" (291). Her mother never called back. On the ship, Ying Yue discovers that Ruth exchanged encrypted messages linked to Asuka's mother's online handle. Mission Control arrests Asuka's mother and orders Asuka detained under sensory isolation. Ruth, cleared by an alibi, slips Asuka letters from her mother expressing love, regret, and denial of involvement.

The DAR system then attacks the entire crew, plunging everyone into hallucinations. During the chaos, A.M., trapped in a simulation, unwittingly destroys the Walkie, the ship's sole communication link with Earth. Ying Yue frees Asuka and Ruth by surgically removing their DAR implants, explaining that A.M. seized command during the crisis. They fight through locked doors and hallucinating crew to reach Lala in the Bot Shop, where Lala has built a device that disables DAR implants on contact. After freeing additional crew, Ying Yue resumes command.

Asuka proposes building a hopper, a small multipropulsion machine, to push the Phoenix back on course, but first sets a trap: Ruth creates a simulated launch while the real hopper stays in its chute. When Gabriela attempts to corrupt the controls, she is caught. Asuka reveals that Alpha had been dropping coded hints through bird references: bowerbirds signaled the anomaly was a decoy, cuckoos indicated an infiltrator, scrub jays pointed to where the remote trigger was hidden, and robins suggested the saboteur could be found. The vanishing of birds from Asuka's DAR after Gabriela's patch was itself a warning.

Gabriela confesses. She weakened the Dining Module hull with Lala's drill, assembled bombs from ship materials, and installed her DAR upgrade across the crew to manipulate everyone's perception. She never intended casualties, having assumed Asuka would carry the tool kit and anchor it safely rather than wear it. Gabriela's motive is grief: Her sister Cora drowned when Manila's seawalls failed, and the seawalls had been built shorter than recommended because the Philippines had gone bankrupt funding EvenStar. Gabriela wanted to turn the ship back, believing the mission distracted humanity from saving itself.

With the hopper destroyed by Gabriela's sabotage and time nearly expired, Gabriela suggests placing one of her remaining bombs on the hull to nudge the ship into alignment. Alpha confirms the math. Ying Yue authorizes the plan. Asuka suits up, overrides Alpha's refusal to open the airlock, and rappels down the wheel to place the bomb. Her cable tangles with seconds remaining. She unbuckles her harness and drops as the bomb detonates, breaking her arm. The blast throws her into space, but she fires her propulsion pack, grabs the scaffold, and Ruth hauls her to the airlock. A.M. confirms the Phoenix is within mission viability range.

In the aftermath, Yaz goes into labor during the crisis and gives birth successfully. Ying Yue proposes the crew establish self-governance through elections and rotating leadership. Asuka composes a letter to her mother, apologizing for years of silence. Without the Walkie, the crew loads the message into nano bots and launches them toward Earth, with an estimated delivery time of 15 years. The novel closes with Asuka echoing her mother's words: "A parent can't write the end of a child's story. If she's lucky, she will never even know it. It's for the child to figure out" (302).