This romantic drama follows two policemen whose job is to investigate the lives of foreigners who have applied for Swiss citizenship. Among the applicants they must screen are a French psychiatrist and his wife, and a ballet dancer. The married couple are quickly accepted, but the dancer's life offers some objections. However, since the younger policeman has fallen in love with her, there is a chance that she, too, will win Swiss citizenship.
Train driver Leo Mangold has been living alone in his two-room apartment for years. His colleague Adrian Hauser is married and having an affair with Thai go-go dancer Apia. To ensure that she does not lose her residence permit, Adrian asks his friend Leo to marry Apia, and Leo agrees. To deceive the immigration authorities, Apia has to move in with Leo, much to his displeasure. They begin to fall in love with each other. Adrian is not happy about this. Nightclub owner Willi also puts pressure on the couple because he wants to place Apia in a massage parlor.
When her apartment is terminated, student Nelly moves with her slightly demented grandmother to her plot in the community garden. Inspired and supported by her enamoured neighbour, she sets off to fight the pedantic president of the family garden, Franco, and unwittingly shakes the well-kept secret that once divided her family - and which had its beginning in the colourful and multicultural community garden world.
