Unnam revolves five men - Sunny (Lal), Aloshy (Asif Ali), Tomi (Prasanth Narayan), Murukan (Nedumudi Venu) and Basheer (Noushi). The group of five coupled with a corrupt cop named Balakrishna (Sreenivasan) plan a deal. However, the deal doesn't work out.
| Actor | Role |
|---|---|
 SreenivasanBalakrishna | Balakrishna |
 LalSunny | Sunny |
 Asif AliAloshy | Aloshy |
 Nedumudi VenuMurugan | Murugan |
 Prashant NarayananTomy Eappan | Tomy Eappan |
 Rima KallingalJennifer | Jennifer |
 Shweta MenonSereena | Sereena |
 Rajesh HebbarVikraman | Vikraman |
 Chithra IyerPadma | Padma |
 Sasi KalingaLopez | Lopez |
 Chembil AshokanNot listed | Not listed |
 KPAC LalithaNot listed | Not listed |