Diogo's 20th high-school class reunion is coming up, and although he's married he sees it as an opportunity to hook up with his high-school crush, who will also be there. He and his wife have a young son, and everything is lined up so he can go to the reunion alone, hook up with the woman, and go home without his wife suspecting anything. Unfortunately, his wife's mother breaks her arm the night of the reunion and can't watch their son. Diogo scrambles to find a babysitter, ultimately settling on a nursery in a strange building. He goes to the party, meets up with the crush, then must leave. He and his three friends then go back to the nursery and pick up his son, who is wearing his favorite dog mask. While Diogo and his friends are on their way back to the reunion (he still hasn't hooked up with his former crush) he removes the dog mask and realizes the boy isn't his. The group returns to the nursery to find an in-progress Alcoholics Anonymous meeting; the nursery has closed and someone else has taken his son home. Making matters worse, the boy is Korean and doesn't speak Portuguese. Diogo now must find his son, return the Korean boy to his parents, hook up with his crush at the reunion, and get back home before his wife returns in the morning.