16-year-old Sebastian's sheltered small-town life changes suddenly when his family takes in 15-year-old Kolja, supposedly the son of his father's recently deceased girlfriend. The two boys begin to open up to each other more and more and discover that they are biological brothers. When Sebastian and Kolja become closer than they expected, Sebastian's life is turned upside down, as he has found not only a soul mate in his new brother, but also a real, first love.