Ar ôl darganfod eu bod yn disgwyl babi, mae cwpwl ifanc yn dianc o ogledd Cymru ac yn dechrau bywyd newydd yng Nghaerdydd. Caiff y darpar dditectif Sally Morris ei chyflogi gan y teulu gofidus i chwilio am eu merch gan ddechrau ar antur gyffrous a pheryglus sy’n ei harwain i isfyd tywyll y brifddinas, diwydiant twristiaeth Aberaeron ac i galon lwgr y mynydd copr.
fter discovering that they are expecting a baby, Luned and Lee escape from north Wales to start a new life in Cardiff.
Budding detective Sally Morris is employed by the young woman's frantic family to find their daughter, but she is not the only one searching for the young couple.
We are led on a dangerous adventure to the dark underbelly of the city and, ultimately, to the copper mountain's rotten core.
