Madison, Wisconsin: In the summer of 2001, five college juniors wake up with . . . not just a hangover, but superpowers. . . .Jack Robinson: Grew up on a farm, works in a chem lab, and brews his own beer. Age: 19. Superpower: SPEED.Caroline Bloom: Has a flair for fashion design and a mother who’s completely out of touch. Works as a waitress for a lunatic boss. Age: 20. Superpower: FLIGHT.Harriet Bishop: Studied violin, guitar, and piano . . . and was terrible at them all. Now writes about music for the campus paper. Age: 20. Superpower: ­INVISIBILITY.Mary Beth Layton: Is managing a 3.8, but feels like she’s working three times as hard as the people around her. Age: 20. Superpower: STRENGTH.Charlie Frost: Has an anxious way about him, and always looks like he’s on day 101 of his most recent haircut.