Fatherless pre-teen Justus happily moves with ma, vet Marita Engstroem, from Stockholm to Hallberg, where she gets a job in his late dad's best friend Marius Bengtson's stud-farm. Mysterious recluse Paul Sommerfeld, actually an anonymous, shy author, meets them trough his wounded dog. Justus bonds with the dog, thus becomes friends with Paul and plays Cupid for him and his ma.