A woman's body in the River Dee, a tragedy in Llŷn, a lost novel, a secret diary, a perplexing family tree. Mystery lurks in the past of all of us, no more so than in the life of world-famous authoress Veronique and the family history of Sisial y Traeth in Abersoch. Journalist Huw Peris sets out to unravel a number of mysteries but will his interfering prove costly for him?