"Kallai Mattum" (Om Namo Narayan in Sanskrit) is a song from the Tamil film Dasavatharam starring Kamal Haasan, Asin Thottumkal and Mallika Sherawat, directed by K. S. Ravikumar.
And one cold winter night on way back to home at VT station in Mumbai he meets a drunk Kuhu (Mallika Sherawat).
Arjun falls in love with Uday's wife, Shabnam (Mallika Sherawat) who also becomes involved with an ISI agent (Kay Kay Menon).