Depicting an innovative interpretation of the cherished Arthurian myths, the series traces the journey of Arthur Pendragon as he transforms from a marginalized heir to an iconic fighter and ruler. The Winter King is entrenched in the 5th century, a time well before Britain was amalgamated, in a region marked by conflict among various groups and tribes during an era that was harsh and where life was frequently ephemeral. The series is an adaptation of Bernard Cornwell's Warlord Chronicles.