The liars are off on a spring break cruise, but they're never far from trouble. Emily's 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 thought this cruise would be the perfect getaway, but I'm here to make sure they don't get away with anything. And now that we're out on the open water, I'll just have to bury them all at sea...