A devoted family man seeks a path back to his loved ones in a mind-bending nine-part sci-fi thriller adapted from Blake Crouch's best-selling novel. College physics professor Jason Dessen (Joel Egderton) lives in Chicago with his wife Daniela (Jennifer Connelly) and son Charlie (Oakes Fegley), blissfully happy with his life choices. The patriarch is drugged and abducted and regains consciousness in a science laboratory in an alternate Chicago, where another Jason decided to pursue his calling as a quantum mechanics physicist and never married Daniela. Instead, this other Jason built a device that allows the user to travel between every conceivable reality generated from every possible decision or outcome of an event. Jason deduces he has become a victim of himself and his family is in grave danger