The planet is under threat of destruction. Washington is in danger. An insane Dieter is about to explode the White House with a stolen nuclear warhead. The army and the intelligence services give up. Who will save the world? Of course MacGruber! The former super-agent, who left the earthly world for the sake of privacy in one of the monasteries in Ecuador, goes on the war-path once again. The dumbass MacGruber is the only hope for America and the whole mankind indeed.