Science teacher Ryland Grace wakes up on a spaceship light years from home with no recollection of who he is or how he got there. As his memory returns, he begins to uncover his mission: solve the riddle of the mysterious substance causing the sun to die out. He must call on his scientific knowledge and unorthodox ideas to save everything on Earth from extinction.

A fatalistic car crash in Mexico city sets off a chain of events in the lives of three people: a supermodel, a young man wanting to run off with his sister-in-law, and a homeless man.