Down-on-his-luck Brieuc returns to his home village penniless, set to take over his late father's farm. At first, he feels a sense of relief and joy at having returned to a place so calm and jovial, but the more time he spends in the village, the more he realizes that something is very, very wrong.

Everyone is happy. Too happy. So happy, they're dying.

To save his village from this mysterious curse, he explores the castle that looms over the little town, where a new occupant has recently taken up residence...