Young Tiria Wildlough is an otter maid touched by the paw of Destiny. Her tale is an epic adventure which takes her from Redwall Abbey, across the wild Western sea to the mysterious Green Isle. There she will fulfil an ancient prophesy and gain her inheritance. Green Isle is the home of the Otterclans but they are beset by dangers from the Wildcat Riggu Felis and his catguard slave masters. Aided by two birds and a platoon of Long patrol hares, Tiria joins forces with the outlaw Leatho Shellhound and his Otterclan.
This is a tale in the true tradition of the Redwall saga. Feasting and fighting, solving riddles from a forgotten volume, and questing in search of her title, Tiria strives to become High Rhulain!