Simon and Robyn are a young married couple whose life is going as planned until a chance run-in with Simon's high school acquaintance sends their world into a tailspin.

James Keaton invents a time machine and goes back seven years to try to thwart the plans of his rival, Frederic Nichols. Meanwhile, Keaton's neglected girlfriend, Leila Locke, finds the time machine and uses it to convince her younger self to not get involved with Keaton in the first place. While in the past, however, she falls in love with the younger Keaton all over again.