Will is forced to overcome his fear of Wargals, the foot soldiers of rebel warlord Morgarath, as Araluen's army prepares to battle Morgarath's forces.

After Ranger's apprentice Will battles Temujai warriors to rescue Evanlyn, Will's kingdom of Skandia joins forces with rival kingdom Araluen to defeat a common enemy.

Now a full-fledged Ranger, Will must rescue his friend Alyss from a rogue knight and uncover vital information needed to ward off a Scotti invasion.

Halt, Will, and Horace set out for Hibernia, where a quasi-religious group, the Outsiders, is sowing confusion and sedition, and they find that secrets from Halt's past may hold the key to restoring order before the last kingdom is undermined.

A young warrior must protect an emperor from an uprising and train an inexperienced army, with assistance from his Ranger friends.