Phoebe and Max want to help Billy and Nora with their science fair at Billy and Nora's school. While the science fair, a huge tomato explodes which Max causes. Barb makes a book club which Hank ruins.

Achille's comet is passing Earth, and it's making the Thunderman's powers go crazy. Phoebe can't go to the school dance with Cole because of the comet, unless she and Max stay three feet together. The dance goes terrible as Max ruins the night for them, with Max getting involved in a dance-off, prompting Cole to leave. Phoebe must race to Cole's house for him to forgive her before they leave for a two week-long trip. Meanwhile, the rest of the family try to control their powers.