Sisters Marian (Jessie Buckley) and Laura (Olivia Vinall) live in a big house away from the city in 19th century. The latter falls in love with Walter (Ben Hardy) a painter that is called to the house in order to teach the sisters the art of painting. Although both love each other he is forced to leave because Laura has a fixed marriage with Sir Percival Glyde (Dougray Scott). Things take a dark turn when the real reasons behind that fixed marriage start to unfold.