New York roof garden architect Daniel Franklin moves in with book shop keeper Karen Wood whose teen son, ice hockey talent Luke, isn't very welcoming. The relationship gets strained as Luke's cardiac condition may need identifying his biological IVF father, which Karen never told him about, pretending it was Swedish exchange student Martin Lundgren. Luke is closest to his lighthearted coach Todd Schwartz, whom Karen absurdly blames and tries to get suspended. Daniel snoops in the uncooperative sperm bank and identifies donor Nr. 108 most surprisingly after lioness Karen failed miserably.