Ysbaddaden Bencawr gives our hero Culhwch a list of forty impossible (or highly improbable) tasks he must complete before he will be allowed to marry Olwen. This takes the first fifteen minutes of the episode. After that, Culhwch's companions slay a giant to steal his sword, and get advice from a series of ancient animals to solve a missing persons case. 

CONTENT WARNINGS: A sub character was kidnapped as a newborn and is found by the protagonists, having been imprisoned his whole life.