Carly's old friend Missy returns to Seattle and tries to become Calry's only best friend and replace Sam because she was Carly's best friend first. Sam realizes what Missy is trying to do, but no one believes her. Missy confesses to Sam, but since no one will believe her, she is forced to ask Freddie for help, so when Freddie wins a six month cruise, he gives it to Missy so she will go away. Shortly after Missy is awarded with the cruise, Carly discovers Missy's plans to destroy her and Sam's friendship. Meanwhile, while packing for a camping trip, Spencer is locked in the basement by a psycotic boy seeking revenge from Spencer for telling on him and getting him grounded.