 Leaving the young ones in Mumzy's care, Diggs and Ambrevina return to Redwall, as Buckler and the other group did upon hearing that Zwilt and the Ravagers were headed there.They join in the battle against the Ravagers' battering ram at the front gate, not knowing that Zwilt and four of his soldiers are attempting to force a secret entrance from the back.After the battering ram plot is foiled, a prolonged siege ensues.