Siblings Mareike, Dietrich and Felicitas Reber can hardly believe their eyes when, after an absence of 50 years, their father Xaver, who was thought to have disappeared in Argentina, suddenly turns up on their doorstep - penniless, without a pension or health insurance and with nothing but his toothbrush in his luggage. Attempts to drop him off at the social welfare office, in a retirement home or at a highway service station fail - and so, one by one, the hard-hitting Xaver wanders through all the apartments, causing quite a stir in the families, partnerships and work of his children. It turns out that the three siblings are also in a bit of a mess, and it doesn't take long for them to realize that their freewheeling father isn't their biggest problem...