Ahanu, one of the last of the Susquehannock tribe, is disillusioned, deeply bitter, and seeking revenge for the death of his clan. But Ahanu finds that murdering innocent settlers will not satisfy that thirst. He has also discovered other feelings when he first sees Siskia, the chief's daughter. She wants nothing to do with him for her heart was promised to another-Pontiac, a young man full of ambition. But Pontiac's profession as a Praying Indian presses her father into action. They have lost enough of their heritage. He will not lose his daughter to the White man's God!

Spirit Rock follows the lives of Ahanu and Siskia as they find themselves in the throes of the French and Indian War, the western migration of Pennsylvania's tribes to Ohio Country, and the horrors of the Gnadenhutten Massacre. But through it all, the faith which they have found proves to be the anchor that will keep them safely secured on the True Rock, Jesus Christ.