会计师卡尔文(凯文·哈特 Kevin Hart 饰)在高中时代曾是学校的体育明星,他热心张罗高中同学聚会,于是在Facebook上联系到了老同学鲍勃(道恩·强森 Dwayne Johnson 饰),他没想到这个在高中时常受欺负的老同学现在已经是CIA的职业杀手,而他也万万没想到自己将被卷入制止军事秘密泄露的任务中。Calvin Joyner was voted in high school the guy most likely to succeed. 20 years later he's an accountant. As his high school reunion approaches, he tries to make contact with his old schoolmates. And someone named Bob Stone contacts him. He says that he was known as Robbie Weirdicht in school. Calvin remembers that he was picked on, as a matter of fact after an extremely nasty prank he left school. They agree to meet and Calvin is surprised by how much he has changed. Bob asks Calvin to help him out. He says yes and the next thing he knows some men burst into his home. They're CIA, the one in charge is looking for Stone, she says he's a rogue agent. When they can't find Bob they leave. Later he approaches Calvin telling him, he is not a rogue agent, he's trying to find a person known as the Black Badger who is planning to sell some information that in the wrong hands can be disastrous. so he needs Calvin's help to stop him. Calvin's not sure whom he should believe.