Vince Vaughn stars as David Wozniak. He is into his forties but still an eternal teenager; he owes a lot of money and isn't very successful. But his life's just going to get even more eventful... after donating sperm a number of years before, he has now been approached by the fertility clinic and told that 142 of his 533 biological children would like to meet their biological dad. Not only that, his current girlfriend, Emma (Cobie Smulders), is also pregnant, yet feels David isn't mature enough to be a father.