On a rainy day, Arnab and his parents accidentally hit and kill a strange old woman. When Arnab and the police investigate her house, they find her daughter Ruksahana chained inside and seemingly disconnected from the outside world. After her mother's funeral, Arnab leaves Ruksahana at home, but Professor Qasim Ali and his men soon arrive to capture her, knowing her mysterious identity. Ruksahana escapes and seeks shelter with Arnab, who takes her in without knowing who she really is.