Tom and Hannah have been platonic friends for 10 years. He's a serial dater, while she wants marriage but hasn't found Mr. Right. Just as Tom is starting to think that he is relationship material after all, Hannah gets engaged. When she asks Tom to be her "maid" of honor, he reluctantly agrees just so he can attempt to stop the wedding and woo her.
More than a dozen Angelenos navigate Valentine's Day from early morning until midnight. Three couples awake together, but each relationship will sputter; are any worth saving? A grade-school boy wants flowers for his first true love; two high school seniors plan first-time sex at noon; a TV sports reporter gets the assignment to find romance in LA; a star quarterback contemplates his future; two strangers meet on a plane; grandparents, together for years, face a crisis; and, an "I Hate Valentine's Day" dinner beckons the lonely and the lied to. Can Cupid finish his work by midnight?