Cockroach Peri loves a good party. He is heartbroken when he doesn’t get invited to the birthday party of the popular ladybug Cinelli. In revenge, he steals her most precious belonging: her shiny red shell. This leads to the mysterious disappearance of Cinelli. But Peri is thrilled, he puts on the ladybugs shell and can now throw her party! However, he soon discovers Cinelli’s life seemed more perfect from the outside. Peri feels bad for Cinelli and decides to go looking for her.