Qatil Haseeno Ka(2001)

Chaudhry runs a posh hotel in the Indian countryside. One day a recently married young couple, Harish and Seema, rent a room for their honeymoon. That night Seema is found killed in the bathtub. The Police are summoned but they are unable to get any clues. Harish meets with his friends who offer to locate the killer by renting rooms in the hotel as newly married couples.