Five high school misfits are called for detention on a Saturday night by their teacher but as the night closes in an elite group of Space Ninjas begin their invasion on the secluded school. After the Space Ninjas kill the teacher, the students are left to fend for themselves, as they try to escape the school grounds and survive the night.

Задержание после уроков пяти учеников обычной школы где-то в Азии превращается в игру на выживание, когда на них внезапно нападают ниндзя-убийцы из космоса.

Pripor po pouku petih učencev navadne šole nekje v Aziji se spremeni v igro preživetja, ko jih nenadoma napadejo morilci ninje iz vesolja.