Rosie and Alex are best friends who spend all their free time together, supporting each other in every way. But one day they are forced to leave, as Alex's family moves to live in Boston. After that, friends understand that they simply cannot live without each other and decide to spend their first night together. However, Alex is late for the flight, which is why Rosie gets drunk with grief and spends the night with Brian. After that, an eighteen-year-old girl becomes pregnant, and her once best friend decides to marry another. But despite the fact that the life of childhood friends has changed in the most dramatic way, they continue to feel affection for each other, even after twelve years ...