Music student Philip takes life on the loose side. He gets along really well with his flatmates Ulli and Mehmet, he takes his piano exams in a relaxed manner, and things have also been going well in terms of love since he met his new neighbor Doro. Although Philip's wallet is notoriously slack, luckily his grandmother Lisbeth always helps him out of a tight spot. After the early death of his parents, he grew up with the scratchy lady, but the two do not have a very close relationship. Although she is his only relative, meeting his grandmother is mostly a chore for Philip. But then Lisbeth began to exhibit conspicuous behavior: she was confused, reacted aggressively and became more and more forgetful. The medical diagnosis is clear: the senior citizen suffers from dementia. At first, Philip tries to literally push the problem away - but his grandmother doesn't want to put up with being admitted to a nursing home. Self-confident and rebellious, she provokes the displeasure of the overworked nursing staff and is summarily sedated. When Philip finds out about this, he regrets his selfish decision. He takes Lisbeth out of the home and puts her up in the flat until he finds better accommodation. A pensioner in the student flat share? At first, Ulli and Mehmet are anything but enthusiastic about it. But with her humorous, refreshingly unconventional nature, Lisbeth quickly wins them over. After all these years, a trusting relationship characterized by deep affection finally develops with her grandson. However, it doesn't take long for Lisbeth's condition to deteriorate. Her dropouts become more frequent and Philip has to admit that he can no longer ignore his grandmother's illness.