Delivery driver David Wozniak (Vince Vaughn) has a life no one would envy: in debt to the mob; a job that's going nowhere and a pregnant girlfriend (Cobie Smulders) who believes their child will be better off without him...

Just when things couldn't look any worse David finds out he's the father of 533 children through sperm donations he made 20 years earlier - and 142 of them are bringing a lawsuit demanding to know his identity.

As David struggles to decide whether or not he should reveal the truth, he starts to discover the father he could become.