Together with a girls camping club, Tamae sets out on a trip to a mountain where it is said that a long-nosed goblin lives. According to rumors, the goblin once was a boy who by mistake killed his own mother and has since been abducting people who have burdened hearts. The girls, who end up getting lost in the mountain, meets the mysterious boy Tsubaki. But who is he really?

When Isari saves a confused-looking girl named Luka from a traffic accident, she has no idea that she has saved no ordinary girl. Luka is actually a dolphin whose brain has been transplanted into a human body by a mad scientist. Not only that, but she also possesses superhuman ultrasonic powers with which she can make her enemies' heads explode or soothe her friends' hangovers the morning after a pub crawl. Together, Isari and Luka stumble upon the cause of Luka's extraordinary existence in a light-hearted film about friendship and belonging, packed with indie music and quirky characters.