On the anniversary of Monika's death, the very beginning of the game, Aya awakens at midnight to find herself surrounded by test subjects that escaped from the laboratory. Aya is aware that Alfred experiments on and kills humans in the basement, as well as the fact that he is involved in an extramarital affair with the younger Maria, a former homeless woman he had taken off the street some years prior. Her father performs secret research in his laboratory in the house's basement, with the assistance of Maria. Her mother, Monika Drevis, was incredibly ill, and presumably died of illness before the occurrence of the game. Aya is a shy girl who never goes outside. Mad Father takes place in northern Germany, where the 11-year-old protagonist Aya Drevis lives with her father Alfred and their maid Maria.
A Steam version, published by AGM Playism, was released on 23 September 2016. The game centers around an 11-year-old girl named Aya, who breaks into her father's secret laboratory to uncover the horrifying truth of his research. The game was developed by Japanese developer Sen, published by Miscreant's Room and released on 10 December 2012. Mad Father ( Japanese: マッドファーザー, Hepburn: Maddofāzā) is a survival horror role-playing puzzle video game.