In the 13th century, a group of monks embarks on an epic journey to bring an ancient relic from their monastery in Ireland to the sacred city of Rome. The mission seems simple, but the reality is very different. Under the watchful eye of their leader, an inexperienced young monk trying to earn the respect of his peers, the expedition quickly turns into a dark struggle for survival. As they traverse stunning yet hostile landscapes, the monks face unimaginable dangers and the internal tensions that arise among them.