When a gangster named Heeralal gets arrested, he befriends Johny, a petty thief, in prison. He seeks Jony's help in executing his mission of smuggling a few diamonds. Johny, however, is an undercover CID officer named Sohan.
| Actor | Role |
|---|---|
 Dev AnandJohny/Sohan | Johny/Sohan |
 Hema MaliniRekha | Rekha |
 PranMoti/Mohan | Moti/Mohan |
 Jeevan DharHeera Lal | Heera Lal |
 Premnath MalhotraRanjit/Rai Saab Bhupender Singh | Ranjit/Rai Saab Bhupender Singh |
 I.S. JoharPehla Ram/Dooja Ram/Teeja Ram | Pehla Ram/Dooja Ram/Teeja Ram |
 IftekharPolice Commissioner Mehta | Police Commissioner Mehta |
| RRandhawaBabu | Babu |
 Padma KhannaNot listed | Not listed |
 Sulochana LatkarNot listed | Not listed |
| Jeevan DharNot listed | Not listed |
 DulariNot listed | Not listed |
| SShyam KumarNot listed | Not listed |
 Mridula RaniNot listed | Not listed |
 TabassumNot listed | Not listed |
 Sajjan Lal PurohitNot listed | Not listed |
| MMadhup SharmaNot listed | Not listed |
 Jagdish RajNot listed | Not listed |
 Keshav RanaNot listed | Not listed |
| CChandra (II)Not listed | Not listed |