Yuki is going back home from school with her brother Sen.
They’re not so close – she’s close to nobody and rather grumpy indeed.
When her keys fall into a manhole she jumps down to catch them, and that’s how a disquieting journey begins among real monsters made of dirt, and monsters made of fears and rage.
The siblings will make it safely out of the manhole in the end, and the scary crossing of mudland will turn out to be a precious passage for Yuki. A sweet and sour initiation story by Beatrice Alemagna.