Prologue is the first level of The Lost Legends of Redwall: The Scout Act II. It takes place immediately following the ending of The Lost Legends of Redwall: The Scout Act I.
Brother Jethro Barleyrow speaks with Captain Barker at Redwall Abbey about the play he's producing, when his grandson William Barleyrow interrupts their conversation, eager to learn more about Sophia Ryemaid.
After having fallen from the Lilygrove Lighthouse, Sophia awakens on the ground below to the sounds of battle.
Making her way around the area, she assists Fraybie Nutworth, Robin Springhunter, and Laban Rushwittles in fighting Scumsnout's sea rats.
The Lilygrove Scout Corps members rendezvous at the nearby docks with Robin, who sends Sophia to meet Valo Scrimpaw, a healer, at Winsome Wraith, who can hopefully help the ill Liam Rivermouse.
Sophia and Liam row across the river, while Sophia attempts to keep his spirits up.
Robin has also directed Tussa Pawsnettle to travel to Winsome Wraith as well, with the Tangram, a special key for Valo.