Rautakauppias Uuno Turhapuro, presidentin vävy.

Uuno's father-in-law is running for president and to avoid embarrassment pressures Uuno to finally get a job, which he does at a hardware store. Meanwhile, a political rival sends a bionic female agent to seduce Uuno in hopes of creating a scandal, and Uuno develops a ploy where he pretends to be his long-lost brother from America.