Crazy movie is a dubbed version of Tamil movie Settai, which is a romantic comedy entertainer where the story deals with three roommates, Arya, a journalist, a graphic artist played by Premgi and a reporter Santhanam.
They are chased around city by gangsters after a stool sample mix-up. Hansika, an air hostess and the girlfriend of Arya, gets a packet and she passes it to her beau. Arya carelessly hands over it to Santhanam to take it to home. On his way to home, Santhanam is distracted by a streetside tandoori chicken stand of dubious hygienic standards and eats chicken that upsets his stomach.
Immediately, he meets a doctor, who asks for a stool sample and the characters soon learn that it's unwise to mix up one's stool sample with a million-dollar packet, thereby triggering to set the plot in motion. Now, the three friends are targeted by a suitably cold-blooded criminal and his gang. What happens next should be seen on-screen.