Chase and Mellie have just graduated high school as co-valedictorians and are looking forward to their summer and to college in the fall. What challenges will they face as they realize they might have to move away from each other for college? Will they stick together? Will love prevail?

Catalina Roberts is bionic. She is out to destroy Adam, Bree and Chase, because of what 'they' did to her parents. After she meets Marcus and Douglass they help her capture them. Marcus then falls for Catalina while Catalina falls for Marcus. But then it goes downhill when Adam, Bree, Chase and the other Davenports destroys Marcus, her beloved boyfriend. She is once alone again, and which only proves her point that the 'Lab Rats' destroyed her parents. It is time for revenge and to destroy Adam, Bree and Chase.