After the spring thaw, the British and their Indian allies mount a major attack to take the valley, and the settlers again take refuge in the fort. Mrs. McKlennar is mortally wounded and ammunition runs short. Gil makes a heroic dash through enemy lines to secure help from nearby Fort Dayton. Reinforcements arrive just in time to beat back the attackers, who are about to overwhelm the fort. The militia pursues, harasses, and defeats the British force, scattering its surviving soldiers in the wilderness. The Mohawk Valley is saved.