In 13th century France, two brothers, torn apart by time and circumstance, are forced to confront their troubled past when Thomas, a battle-hardened mercenary, returns to his hometown. The younger brother, Arnaud, has lost his memory after a brutal beating, leaving him at the mercy of his wife Guillemette, who must convince Thomas to help her reclaim his lost knowledge and restore balance to their family's history. As they embark on this perilous quest, their sibling rivalry is rekindled, threatening to upend the fragile bond between them.