This limited series follows the intertwined stories of two characters, Sam and Helen, as they navigate grief, trauma, and the mysterious rituals of an isolated island community.

The series follows the stories of two characters, Sam and Helen, who both find themselves on a mysterious and isolated island off the coast of England. Sam is drawn to the island in the first half of the series, while Helen becomes stranded there in the second half. Both characters are grappling with the loss of a child, and the series effectively explores the different ways in which they cope with their grief and trauma.

The island's inhabitants are deeply connected to the land and its history, and the series presents a world in which ancient traditions and beliefs are still alive and well. The Third Day is a visually stunning and thought-provoking series that will leave viewers questioning their own perceptions of reality and belief.