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.

An untold bedtime story following the simple life and trade of a Heartsmith who spends his days mending the broken hearts of people suffering from sadness, brought to him by the mysterious Umbrella Man