Mossa has returned to Valdegeld on a missing persons case, for which she’ll once again need Pleiti’s insight. Seventeen students and staff members have disappeared from Valdegeld University—yet no one has noticed. The answers to this case may lie on the moon of Io—Mossa’s home—and the history of Jupiter’s original settlements during humanity’s exodus from Earth. But Pleiti’s faith in her life’s work as a scholar of the past has grown precarious, and this new case threatens to further destabilize her dreams for humanity’s future, as well as her own.

Zenya was a teenager when she ran away from home to join the mechanically-modified warrior sect. She was determined to earn mechanized wings and protect the people and city she loved. Under the strict tutelage of a mercurial, charismatic leader, Zenya became Winged Zemolai. But after twenty-six years of service, Zemolai is disillusioned with her role as an enforcer in an increasingly fascist state. After one tragic act of mercy, she is cast out and loses everything she worked for.

Some stories take more than one lifetime to tell. There are wrongs that echo through the ages, friendships that outpace the claws of death, loves that leave their mark on civilization, and promises that nothing can break. This is one such story. Annelid and Leveret met as children in the middle of the Sri Lankan civil war. They found each other in a torn-up nation, peering through propaganda to grasp a deeper truth. And in a demon-haunted wood, another act of violence linked them and propelled their souls on a journey throughout the ages.

Leigh grew up in Rotterdam, drawn to the waterfront as an escape from her unhappy home life and volatile father. Enchanted by the undersea world of her childhood, she excels in marine biology, travelling the globe to study ancient organisms. When a trench is discovered in the Atlantic ocean, Leigh joins the exploration team, hoping to find evidence of the earth's first life forms—what she instead finds calls into question everything we know about our own beginnings.

Karys Eska is a deathspeaker, locked into an irrevocable compact with Sabaster, a terrifying eldritch being—three-faced, hundred-winged, unforgiving—who has granted her the ability to communicate with the newly departed. She pays the rent by using her abilities to investigate suspicious deaths around the troubled city she calls home. When a job goes sideways and connects her to a dying stranger with some very dangerous secrets, her entire world is upended.