Fareb is not just a love triangle, revolving around a man torn between love [wife] and lust [the other woman], but also a murder mystery. And the women in this story go to extremes to get the man they desire.

Aditya [Manoj Bajpai] works as a creative director in an advertising agency. His wife Neha [Shilpa Shetty], a medical practitioner, is devoted to her husband and kid. Riya [Shamita Shetty] was married to a corporate honcho [Bakul Thakker], who happened to be a client of Aditya's ad-agency. Riya and Aditya meet at a presentation and she gets attracted to him.

Riya is completely smitten by Aditya and tries to seduce him time and again. He spurns her initially, but succumbs to her charms eventually. This leads to a rift between Aditya and Neha. And then the unthinkable happens: Riya is murdered. The needle of suspicion points towards Aditya and being the prime suspect, the cops [Kelly Dorji, Hemant Pande] arrest him. Someone is also watching Aditya and blackmailing him for his affair with Riya. Who killed Riya?