Sihja is a young, charming and a little outrageous fairy, who leaves her home in the forest. On arrival in the city she meets a sensitive new friend, lonely human boy Alfred (11). Sihja loves the newly found urban shapes and orderly habits of the city people. The friends bond quickly and have a lot of fantastic fun, until one day they find dead birds. At first, it looks like the smelly fertilizer factory and its stern director Lisbeth Spiderville could be the culprit, but when Sihja reveals her uncontrolled fairy powers, people begin to be wary of her. Alfred and Sihja set out to uncover what is threatening nature, eventually managing to prevent an environmental disaster. Thanks to Alfred, Sihja learns to master her superpower and to apologise, and with the help of Sihja, Alfred finds his confidence.