He's a rich and grinchy workaholic. She's one of his merriest and most annoying coworkers. They couldn't be more opposite. But when he needs a plus-one for a friend's yuletide wedding, he's betting on Christmas to lure her into being his last-minute date. What he doesn't count on is her demanding his quid-pro-quo performance as her fake boyfriend for her matchmaking family over the holidays... or them both enjoying fake dating so much.