Sandra is new to the neighbourhood and she's shy. The girls in her class don't make it easy for her either. She doesn't fit into the cool clique around Nadja and Isa at all. But when she meets 14-year-old Mike who lives in the house across the street, all her problems seem to be forgotten. She falls head over heels in love with him. However Sandra doesn't know that Nadja, too, has had a crush on Mike for some time and Nadja doesn't miss any opportunity to score points with her feminine charms - Nevertheless, Sandra and Mike are becoming closer. But their young love is soon put to the test. One day, they observe Mike's mother with a stranger. Mike is outraged. He can't understand that only a year after his sister died, his family will now be completely destroyed. But Sandra is staggered as well. How can she explain to Mike that the stranger is her father? Afraid of losing Mike, she tries everything to keep the matter secret. But by doing so, she becomes entangled in contradictions. ..