The heroes of this comedy-drama are members of a three-generation intelligentsia family. Lena, the school principal, organizes a party to celebrate her father's 70th birthday. Only the closest family members are to be present, but the birthday boy, unexpectedly, invites someone else whom he would like to introduce to the household. The suddenly revealed secret he has been hiding for sixteen years will radically change the course of the festive evening. The initial consternation and embarrassment will, over time, turn into a veritable avalanche of mutual accusations and grievances and will trigger the previously hidden aggression. The image of a loving family, built by the heroine using lies, understatements and empty declarations, will crumble in an instant. When telling the events of that fateful evening, the director uses the "home video" convention that is often used in similar situations. Apart from casual and trivial wishes, the camera also records the characters in situations not intended for a special occasion film, and observes and immortalizes their reactions and conversations that should never come to light.
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