Three-hundred-and-fifty-years ago, a Potawatomi Indian boy named Red Eagle carved a small bear out of limestone. It was lost during a legendary battle at Fort Mechingan, somewhere deep in the woods of what is now Door County, Wisconsin. Although searchers have tried, no sign of the fort has ever been found. While spending the summer in Door County, a boy named Wyatt decides to look for it. Meanwhile, a Potawatomi boy named Robert listens to the story...