What comes after marriage? Must lovers become merely friends? Is love always replaced by companionship? Young couple Sid (Farhan Akhtar) and Trisha (Vidya Balan) are discovering the occasionally tricky side effects of marriage.

The birth of their lovely baby girl has placed their relationship under strain. Sleepless nights and endless arguments are driving them apart. But with a few little lies and a dash of romance, they find a way to reignite the flame. Soon they're living out each other's fantasies, bringing lust and longing back into their marriage!