Is destiny a matter of chance or a matter of choice? All Kanba and Shouma know is that when their terminally ill sister Himari collapses, her death is temporarily reversed by the penguin hat she wears. To keep Himari alive they must find the mysterious Penguin Drum. To do so, they must answer a chain of riddles that links them to strangers who all have their own secrets and "survival tactics." From the creator of Revolutionary Girl Utena comes a story of love, fate, life, death ... and Penguins.