Nina (38) loves her little family and is passionate about her job as an architect. When she returns to work after parental leave, she is able to save the office from bankruptcy with an ingenious idea. The only catch: she has to pretend to be single and married to her work. Nina gets no help from her husband Torsten (38) because he sees her dream job as a threat to the family. In desperation, Nina pretends he is her brother and secretly hires granny-for-hire Irmgard (70). Between lies and success, Nina's life picks up so much speed that she soon can no longer find the emergency brake.