Harold "Hap" Miller, whose parents owned the Hanging Rock Ranch, is best friends with Jim Hawn, a boy of the Yakima tribe. When a calf goes missing on the ranch, the two boys ride out to find it—and set off a chain of events that reveals a modern-day mystery!

"Another fast moving Mary Adrian mystery. Like the others, into its plot is woven a lot of interesting information about life on a western ranch and an Indian reservation." —The Times Recorder