Nofel dditectif afaelgar gan awdur profiadol. 'O'r diwedd, mae'r amser wedi dod i weithredu. I ymddial. I wneud yn iawn am yr hyn ddigwyddodd.' Mae yna lofrudd yng Ngerddi Hwyan. Un sy'n barod i ddial ar ôl blynyddoedd maith. Un noson, mae'n taro yn ddidrugaredd ac mae'r dioddefwr cyntaf yn teimlo min y gyllell.
Three years after she nearly died on the golden slopes of Mynydd Parys mountain the events of that night continue to trouble Sally Morris. Now a DS, she finds herself part of the team responsible for catching a killer. There are few clues despite the bloodshed. Will this inexperienced detective and her partner be able to find the killer before he strikes again... and again?