A genius teenage boy is in love with a girl who breaks up after a year. He invents a time-machine and tries to fix the break-up repeatedly. He finally goes a year back with his friend/advisor to fix the bad days.
Physics prodigy Stillman (Butterfield) is destined for great things, only to be derailed when his girlfriend, Debbie (Turner) suddenly dumps him. But Stillman isn’t beaten, he does what any heartbroken genius would do – he invents a time machine to get a second chance at love.