A psychologist, an Englishman, a bellboy and a wounded female assasin have their fates crossed at a sleazy Bangkok hotel.

In the wake of a deadly SARS outbreak that's turned ordinary folks into flesh-eating zombies, Thailand stands alone as the only nation to block the pandemic. That is, until the virus finds its way into a crowded Bangkok apartment complex.

A mistake of experiment may transform human into devil species. Dr. Diana and her father, Dr. Rung, discovered a new kind of snake-bite serum, X5N-1, was the great serum that could protect humans from snake poison. Both scientists were invited by World Health Organization (WHO) to receive a great award at Switzerland. Dr. Diana had to travel with Alex, her boyfriend, because her father would like to continue experimenting at the laboratory. During the experiment, Dr. Rung was bitten by a fierce snake. This made him transform into devil species with human's body and snake's head. At the same night, he killed all scientists in the research institute.

Bombay to Bangkok is a Bollywood film starring Shreyas Talpade and Lena Christensen in the lead roles. It is written and directed by Nagesh Kukunoor and produced by Elahe Hiptoola and Rahul Puri. Shankar (Shreyas Talpade), a petty thief, in desperate need of money, steals from the local don (Naseeruddin Shah) and escapes his way into a team of doctors heading for relief work to Bangkok. Unfortunately, he loses the all-important money bag in the chaos. In Bangkok, his world turns upside down at a massage parlour where he bumps into Jasmine (Lena Christensen). The hitch is, she is all Thai and he can't converse with her at all. A ray of hope comes his way the next day when Jasmine turns up desperately in need of a doctor. Shankar, posing as a doctor along with the Sardar buddy Rachinder, jumps into this whirlpool, while Jasmine soon gets pulled into his bumbling adventures while running away from the don and his son (Vijay Maurya).

A woman who is a minor wife for a psychotic police officer takes her lover back to her condominium when all of a sudden the cop walks in...