Anders and Lotta are newly in love. Everything would be great if it weren't for Anders' partner Sofia and Lotta's husband Kurt who still doesn't know anything. Anders is an ornithologist and when he hears that a real rarity, the Mongolian Pipit, has been seen on Gotland, he sees his chance to see his three hundredth bird and become a member of the prestigious Three Hundred Club. But it also means that he can be alone with Lotta. Before they can tell their respective that they love each other, they are exposed.