Introduction: Emily is smooching a stowaway. Aria's treasure-hunting partner is a little too interested in her booty. Spencer's going overboard trying to land a new boy. And a blast--or rather, a crash--from Hanna's past could mean rough waters ahead for everyone. The liars better tighten their life jackets. A perfect storm is brewing, and if they aren't careful, A will bury them at sea. . . ....