Lisa and Yegor have just married and finally found their dream home — a big house by the lake. However, there is a catch: the eccentric old owner, Petrovich, will continue living with them until he passes away. Despite this unusual condition, the couple loves the house so much that they agree to the contract. But life with Petrovich brings a series of problems and humorous situations into their lives. As they navigate these challenges, the newlyweds not only grow closer but also gain an unexpected new family member.