Mae chwech disgybl cwrs trochi Ysgol Uwchradd Glan y Gors yn mynd ar drip ysgol i wersyll Coed Daniel. Ond nhw ydi'r unig ddosbarth sy'n llwyddo i gyrraedd pen y daith. Mae'r criw yn gaeth yn y gwersyll, mae'r goedwig gyfagos yn llawn bwystfilod, ac mae eu hathrawes yn sâl. A fedran nhw weithio gyda'i gilydd er mwyn achub ei bywyd hi a ffoi rhag y gelyn anfarwol?
Rebecca lives in north Wales with her husband and children. She writes in Cymraeg and English, for adult YA and MG readers, and has translated several of her own books into English.
#Helynt, her first YA novel, won a 2021 Tir na n-Og Award and the 2021 Book of the Year (Children and Young People Category), and is now a GCSE set text. Her first MG novel, Anfarwol, was also shortlisted for both the Tir na n-Og and Welsh Book of the Year awards in 2026.