Madly Bangalee is a Bengali rock band that inspires the film’s title. They rehearse in a dowdy garage of Kolkata, owned by Bobby (Lew Hilt), who owns Bobby’s Garage. Four young boys with stardust in their eyes practise their numbers not knowing what they are really aiming at. But the garage is under threat from a South Kolkata don Baburam (Chandan Sen). One morning, an elderly man, San (Anjan Dutt), arrives from "America and Paris." Baaji, (Sumit) the drummer who is a Muslim had to drop out of school. He escapes from the trap of turning a terrorist like his older brother Sultan. He later becomes a police officer who bashes up everyone who tries to bribe him. Neon (Tanaji) plays the rhythm guitar but, sucked into the world of drugs, he disappears from the face of the earth with his guitar. Pablo, lead singer, bass guitarist and lyricist, leaves for the US and the group breaks up. Bobby dies.
Armed men hijack a New York City subway train, holding the passengers hostage in return for a ransom, and turning an ordinary day's work for dispatcher Walter Garber into a face-off with the mastermind behind the crime.
Aliens land in South Africa and, with their ship totally disabled, have no way home. Years later, after living in a slum and wearing out their welcome the 'Non-Humans' are being moved to a new tent city overseen by Multi-National United (MNU).