Watch Promise (2021) HD Full Movie Free on SolarMovie. Watch Promise (2021) online free. A retired contract scout for the union, compelled to move on from his tragic past, embarks on a dead...A retired contract scout for the union, compelled to move on from his tragic past, embarks on a deadly mission with gunfight battles, double crosses, and an unexpected showdown to learn what happened to his true love and her little girl.