Tyran and Tyrel Lyreil are about as mischievous and fun-loving as two boys can get. With their two pals, Jeff and Jam, and their two horses, Chum and Trusty, they are forever finding pranks to play on their mother's ranch. They tease the good-natured cowboys and plan excursions to a secret place in the canyons that only they know of. They are not only capable of fun, however. As they grow into young manhood they can and do work as hard as the hired hands. They hunt and they fish, but most of all, they ride. They tackle almost every creature imaginable on their vast California ranch. Their way of life is their passion. When it comes to true American honesty, blood and guts, and the right to defend and protect what is theirs, no one beats the Lyreil boys. They may be young teenagers and full of spirit, but they have a code of honor they follow that neither threats nor bullets can pierce. Between humorous exploits of good clean fun, the young cowboys know what it means to work hard and face in the duties of every day life the real possibility of sudden and violent death. Whether it's branding the cattle or facing down rank ranch bulls, ridding the earth of venomous reptiles or tracking down rustlers, the Lyreil boys get the job done. No matter what the cost.