Confused and with no memory of his identity or why he's there, Ryland struggles to orient himself as fragments of his memory gradually return. As time passes, he discovers a shocking truth: he's not an astronaut, but a middle school teacher with a PhD in molecular biology, chosen to take part in the Hail Mary mission, the last and desperate hope to save the solar system. The Sun is dying due to a mysterious substance that's sapping its energy, a phenomenon that appears to be affecting other nearby stars as well. Only one star, nearly twelve light-years from Earth, appears immune to this enigmatic condition.
Ryland must therefore use all his scientific ingenuity and his spirit of improvisation to solve the puzzle and find a solution that can prevent the extinction of life on Earth. During his journey, amid extreme solitude, experiments, and surprising discoveries, his path takes an unexpected turn when he comes into contact with an alien entity he names Rocky (James Ortiz). From that encounter, an unusual alliance will be born that could change the fate of both their worlds. MORE INFO