After surprising her aunt Bee with the cruise vacation she's always dreamed of, Jessie Henderson is looking forward to a week of rest and relaxation. The most difficult thing she'll have to do is decide what to order for dinner.

But then a fellow guest is found murdered. The crew don't take the threat seriously and a passenger with an agenda intervenes to keep the crime a secret from the other guests. 

Suddenly, Jessie's vacation is transformed into a race to find the killer before he strikes again.