Traveling with a group of American Zen priests across North America and Japan on a pilgrimage to capture the life of their master: a man named Soyu Matsuoka. Born in Japan near the turn of the 20th century, Soyu Matsuoka was a pioneer in the American Zen Buddhism movement. Many things taken for granted nowadays when people practice Zen were first introduced by Soyu Matsuoka, and “Silent Thunder” aims to highlight this in the form of a complete biography of his life.