Barrett Bloom is hoping college will be a fresh start, but when school begins on September 21st, everything goes wrong. Humiliated by the know-it-all in her physics class, she botches her interview for the college paper. At a party that night she accidentally sets a frat on fire. Locked out of the dorm by her roommate, Barrett falls asleep in the common room. The next morning it's September 21st. Again. And after a confrontation with Miles, the guy from Physics 101, she learns he's been trapped for months. After her attempts to fix her timeline fail, they work together to find a way out. As they start falling for each other, what happens to their developing relationship if they finally make it to tomorrow? -- Adapted from jacket.