At the end of the nineteenth century, little Marcel lives with his parents in the Provence countryside. During his holiday, Marcel meets Lili, a local boy who knows all the secrets of the hills, and the two become fast friends.

English artist Louis Wain rises to prominence at the end of the 19th century for his surreal cat paintings that seemed to reflect his declining sanity.

In an alternate 1995, a mysterious disease has wiped out all of the adults. In this new age, two gangs are pitted against each other in a brutal war for territory, resources and survival.