When overly-giving brand strategist Chelsea Simms discovers the latest dating app for her firm, The Good List, has given her the magical ability to teach all the selfish, "naughty" people in her life a lesson in how to be good again with a swipe of their name, she starts to fall for her neighborly friend Fisher, the one guy who has never used her for her giving nature. But when Chelsea lets the app get the best of her just before Christmas and selfishly puts Fisher on the naughty list by mistake, she must find a way to right her own naughty deeds and get Fisher to forgive and fall for her once again, and find her way back onto the Nice List in time for Christmas Eve.