Marshall doesn't want to be the most popular guy at Blake Holsey; he just wants his friends to notice him. But when he begins to feel completely ignored, Marshall finds himself disappearing until he becomes invisible. Although enjoying his newfound ability at first, Marshall starts to realize that he is slowly fading away into nothing. Can he and his friends restore his visibility before he ceases to exist?

Corrine's perfect record is put to the test when she has the worst day of her life. Everything starts when Josie unplugs her alarm clock, making her late for class and leading into a series of events gradually making the day worse at every turn. The worst part of it is that Corrine must do this all again tomorrow when the day keeps repeating itself. She must accept the fact that every day isn't perfect or be pulled down with her own personal neverending time loop.

There's just no way Josie could be a thief, or could there be? It's a battle of truth vs rumour, as it becomes intolerable for Josie and Corrine to share the same living space. Meanwhile, the sponge in the aquarium is multiplying and covering the school. Lucas, Marshall, and Professor Z have to get to work before the sponges cover the entire planet...