Mae criw Anturiaethau'r Brenin Arthur ym mlwyddyn 10 erbyn hyn ac er bod Arthur wedi dychwelyd i'w ogof i gysgu a dim gobaith o ddod o hyd iddo eto, maent yr un mor awyddus ag erioed i dynnu sylw at yr argyfwng natur. Ond daw'r criw i ddysgu fod mwy na physgod yn byw yn y llyn lleol.
The Anturiaethau'r Brenin Arthur
gang are now in Year 10, and although Arthur has returned to his cave to sleep and there is no hope of finding him again, they are as keen as ever to draw attention to the nature emergency. But they soon learn that there are more than fish living in the local lake.
