Lauri Mustonen, kidney transplant surgeon, and Pauli Bergstrom, insect researcher, are housemates at a prestigious address. Their home is owned by an elderly lady, Lydia Molotova, who hasn't raised the rent for years. Complications erupt when Lydia hands the property over to her nephew as advance inheritance. Master Sergeant John Molotov, a greedy heir, instantly hikes the rent into the stratosphere and, as an added bonus, shoves his old aunt into residence with her erstwhile tenants: the kidney cutter and the insectologist. It's an edgy situation but the two bachelors decide to follow Lydia's advice and sublet a bedroom to help cover costs--with hilarious results.