Dr. William Sterling is very curious about a highly mutilated body; moreover, he is astounded by seeing its X-ray. Simultaneously, Roumoult Cranston, a lawyer, is attacked in his grandpa"s house. To add to his frustration, he sees a disappearing train. But this is not the end of it. As days pass, the two friends discover more and more corpses. As they strive to solve the mystery, they find themselves in a death trap, where it is difficult to draw a line between sanity and insanity.