Donna's senior prom is supposed to be the best night of her life, though a sadistic killer from her past has different plans for her and her friends.

William Warner is a lawyer who is famous for his skill at opening any kind of lock, making him a valuable commodity. William is unknowingly enlisted by German spies who want him to open a chest containing a secret formula. This leads to a madcap adventure involving spies, the police and lots of picked locks!