Two men in their thirties and forties made a lot of jokes because their parents remarried and became brothers, and they still lived together.

Brennan Huff (played by will ferrell) is 39 years old, but he doesn't have a decent job yet. The salary of occasional odd jobs is definitely not enough, so he has to live with his mother until now. At the same time, 40-year-old Dale Dobak (played by John C.Reilly) is also an older youth who is often unemployed. He can't support himself and has to live with his father. When Brennan Huff's mother fell in love with Dale Dobak's father and got married, Brennan Huff had to follow her mother and move to Dale Dobak's father. But Dale Dobak didn't welcome the arrival of this "halfway brother" very much. He secretly vowed to give each other a duel. And Brennan Huff is certainly not easy to mess with, so the two brothers began to fight with each other. However, when their selfish nonsense broke the feelings of the old couple, they saw that the newly formed family was about to be separated. Once again, they stood on the same front and began to plot how to get their parents back for the second time. At that time, they gradually discovered that they actually had many similarities with each other, just like their own brothers. ...