What could be a worse feeling than that?
After 18-year-old Sam gets an invitation for a free vacation in the mail, she hops on the opportunity despite her mother's pleas not to go. With the realization that her best friends have all been invited as well, she's sure she made the right choice. Once they board the fancy cruise ship however, things aren't as luxurious as they had seemed.
Passengers start to disappear and once the ship lands on a deserted island, Sam and her friends are left on their own to figure out why. Faced with a deadly predicament, they have to learn to survive amid a mass of nightmare creatures all out for the taste of her blood. With the help of a handsome yet suspicious island native, Sam must figure out how to get back to the mainland before she's trapped on the island forever.