As a young boy growing up in the hills of central Vietnam, Nhuong's companion was Tank, the family water buffalo. When bullies harassed Nhuong, Tank sent them packing. When a wild tiger threatened the entire village, Tank defeated it. He led the herd and adopted a lonely puppy. Tank was Nhuong's best friend.

Nhuong gives readers a glimpse of himself when he was their age, and tells a thrilling story of how he and Tank together faced the dangers of life in the Vietnamese jungle which was their home.