Happily married for fifteen years, Zuzana finds out one day that her husband has been having an affair with another woman for a long time. Zuzana does not hesitate and decides to visit her daughter-in-law Lenka and make her a slightly unconventional proposal. Her plan is scandalous. She suggests that she share the care of Jirka and turn him into a man for a change. Lenka finally agrees and both women introduce this new way of life to Jirka. So he puts him in front of the finished thing. What seems like a perfect plan to everyone at first, one week with his wife and the other with his mistress, may end up as a nightmare for everyone.