In a collapsing world, astrophysicist Ava Kwon detects an alien signal from Proxima Centauri, sparking hope and fear. Leading a mission aboard the *Odyssey*, she navigates cryosleep, a sentient AI, and a cryptic warning from another source. As Earth unites to build a device from the signal, Ava faces cosmic truths and personal sacrifices, racing to save humanity from annihilation in a universe of mystery and peril.