Your best friend David, who you called Loki for short since he always got into so much trouble, is always dreaming about becoming a detective, so he can help people. But first he's gotta at least get through high school without getting expelled.

It's finals week, and Loki hasn't started studying until two days before his first test. Like always, you were his first option, being his best friend. You got a call on the home phone from him, saying he needed help. You coudn't say no, since he was already on the way.