Watch The Engagement Back-Up (2022) HD Full Movie Free on solarmovie.do. Watch The Engagement Back-Up (2022) online free. Traditionalist historian Luna must pretend to be engaged to a tech mogul's son to rescue her late fa...Traditionalist historian Luna must pretend to be engaged to a tech mogul's son to rescue her late father's naval museum. If she discovers there's more to Jackson than meets the eye, can she expand her romantic horizons as well?