This is a two-person drama that tells the story of going through trauma after the sudden death of a loved one in a very unusual and theatrical way. We meet a father (Rafał Kronenberger) and a daughter (Oliwia Zalewa) who are trying to find themselves again after the death of their wife and mother. It turns out that experiencing a difficult moment together can be a chance for them to deepen their relationship.

The author uses black humour to describe the ruthlessness of a controlling mother who wants to decide the choices and attitudes of her loved ones even after death. The Mumburger of the title is the last family meal shared and a kind of pop culture communion after a diminished wife and mother. The performance is a mixture of black humour and an encounter with the ruthlessness of death, but also an attempt to find a place for spirituality in the modern world of markets, burger shops, fries and shopping malls.