After the mayor falls down dead in the middle of a speech, a clandestine student society claims credit for his demise.

Clare Vengel is given her first undercover assignment: to pose as a student and penetrate the society. A streetwise amateur mechanic, Clare finds university a foreign land, and she has trouble creating an in with the suspects. She quickly alienates a popular professor and loses the respect of police superiors.

When another politician is killed, Clare kicks herself into high gear. She forges friendships with students and makes inroads into the secret society.

As the body count rises, Clare realizes that the murderer she has to unmask is someone she has come to consider a friend. She only hopes that the friend doesn't unmask her first.