Ben, Danny, and Tucker are looking forward to attending the biggest Halloween celebration in the city, despite the fact that Bonnie thinks they should take Emma trick-or-treating instead. When their plans fall through, they decide to crash the party Riley was talking about, not knowing it's actually a bachelorette party. But when the guys are mistaken for the strippers, Ben makes a big mistake that results in them being carted off to jail. Meanwhile, Bonnie's date with Javier goes horribly wrong and she lands in jail alongside Ben, Danny and Tucker. Will Riley be able to work her lawyer magic and bail her friends out of this mess, or will everyone get what they deserve?

Baby Daddy follows Ben, a young man in his early 20s living the life of a bachelor in New York City with his buddy, Tucker, and his brother, Danny. Their lives are turned upside down when they come home one day to find a baby girl left on the doorstep by an ex-girlfriend of Ben's. After much deliberation, Ben decides to raise the baby with the help of his friends and his protective and sometimes over-bearing mother, Bonnie, and his close female friend, Riley.