Toq was the child of Klingon warriors captured by Romulans in 2346 at Khitomer. Raised at the secret Romulan prison camp on Carraya IV, Toq had little exposure to Klingon culture until Worf visited the prison camp in 2369.
Worf taught him an ancient Klingon martial arts exercise, and sparked his interest in their heritage, something their parents had kept from them. Worf taught Toq the Klingon legends and customs, took him on a hunting trip, and taught him that a warrior was inside of him. After returning from the trip, Toq entered the hall carrying an animal he killed in the hunt. He declared himself a warrior and led the Klingons in an old hunting song.
When Worf was ordered to be executed by Tokath, the Romulan leader of the camp, Toq appeared in warrior's armor and stood with Worf. Joined by others, Worf was spared and allowed to leave the camp. Inspired by Worf's teachings, Toq left the camp in order to join mainstream Klingon society. In doing so, he promised to keep the existence of the camp a secret. (TNG: "Birthright, Part II")