King Trisong Detsun, who was king who first introduced into Tibet, asked the Buddhist practitioners to come up with a simple  list of what was proper Buddhist conduct for the Tibetans. They came up with ten simple rules and this became a major teaching of how Buddhist sshould conduct themselves.

In this book, Thrangu Rinpoche elaborates on each of these ten virtuous actions showing how they affect one's karma and describing them in greater detail.