ヘビと言われる川が小さなノアベリ村を通っています。郵便配達人のフェデリコはもうすぐ職を失いそうです。孫娘のイリアにはおじいちゃんを救うある計画がありました。でも、村長のイシドロさんは川とフェデリコが大嫌いです。相手に届かない手紙…そして、みんながなにか秘密を隠しています。さぁて、どんな秘密でしょう？

The river, or the serpent, crosses the small village of Noaberri. Federico, the postman, is about to lose his job, but his granddaughter Iria has a plan to save it. But Don Isidoro, the mayor, hates the river, and he also hates Frederico.

O rio, ou a cobra, atravessa a pequena cidade de Noaberri. Federico, o carteiro, está a ponto de perder seu emprego. Iria, sua neta, tem um plano para salvá-lo. Mas don Isidoro, o prefeito, odeia o rio e também a Federico.

Pincho the hedgehog lives with his family on the hillside of a mountain. He is inquisitive and adventurous, so when he hears about the dark lands he simply has to go and find out about this mysterious, menacing place.