Bastard son Arthur returns to the land he's been banished from to find a kingdom in chaos. Seeking the aid of his oldest confidants, Arthur aims to right Britain's path as he faces the most unexpected of obstacles.

In the late 1990s, the arrival of elderly invalid Patrick into Marion and Tom’s home triggers the exploration of seismic events from 40 years previous: the passionate relationship between Tom and Patrick at a time when homosexuality was illegal.