Parthiban plays Ayya, a respected man who runs a cinema theatre. The story begins when bombs are placed inside the theatre during a movie. Surya and Rattan play police officers who want to defuse the bombs without letting the audience know. Vikram plays a man inside the theatre, and Suvalakshmi the woman outside who loves him.
A giant metal machine falls to Earth and frightens the residents of a small town in Maine in 1958, until it befriends a nine-year-old boy named Hogarth and ultimately finds its humanity by unselfishly saving people from their own fears and prejudices.
Following a bomb scare in the 1960s that locked the Webers into their bomb shelter for 35 years, Adam now ventures forth into Los Angeles to obtain food and supplies for his family, and a non-mutant wife for himself.