Watch Blue Moon Ball (2021) HD Full Movie Free on SolarMovie. Watch Blue Moon Ball (2021) online free. Novelist Grace Montague returns to her home to finish her latest book. In the town famous for its ra...Novelist Grace Montague returns to her home to finish her latest book. In the town famous for its rare Blue Moon Ball, Grace finds her first love, Sean, desperate to save the town's historic ballroom from closure, and he needs her help.