Raghu's friends and fellow college students, Kannan, Jana and two others gang rape a young woman that ran away from home with her boyfriend.

The young couple commit suicide and Inspector David finds clues to tie students from the college to the crime.

To distract the inspector from the investigation, the rapists arrange for a college strike using Raghu as an excuse.

Kannan, Raghu and Rosie's paths cross continually until a culminating event forces a confrontation.

Ilamai Kaalangal is the debut film for Balaji, and Sasikala and Rohini in leading roles.