Cheltenham, 1991

When Eva Patterson returns home from work one day, a devastating scene awaits her. Her mother, Flora, lies dead in the bath. Beside her is a note saying only- 'Forgive Me'.

Eva is shocked to find out that her mother was once a successful artist back in the 1960s. When she visits her mother's old studio, she finds a collection of Flora's paintings and diaries. Searching for answers, Eva encounters a psychic who mysteriously warns her to beware of a 'sleeping serpent', which she soon discovers refers to a shocking crime in Flora's past.

Will discovering the truth destroy Eva's belief in everything she holds dear?