Claudia's geeky boyfriend Adam has just invented a time machine. No, really-he has. She doesn't believe it either until Adam provides her with definitive proof that he does, in fact, have a functioning time travel device sitting in the living room of his Manhattan brownstone. But instead of getting ready to accept the Nobel Prize, Adam has very different plans for his groundbreaking invention. He wants Claudia to use the machine to travel back in time and stop the accident that landed him in a wheelchair over a decade ago, and prevent the trajectory of events that he believes ruined his life. When Claudia reluctantly agrees to become the first human time traveler, she knows she's making a big gamble. If she succeeds, she could have the happy ending with commitment-phobic Adam that she's always dreamed of. But if she fails, it could mean the end of the universe as she knows it.