Placidas is a squire being chased by the evil Corflambo who asks Arthur for help. His friend Amyas has been imprisoned where Corflambo’s daughter Poeana watches over him. Poeana loves Amyas, so Placidas pretends to be him in order to escape. After Corflambo is dead, Arthur asks Placidas to overlook his daughter Poeana’s past sins, and Placidas takes her as his wife.