Tween optimist Molly McGee lives to make the world a better place, fix what has gone wrong, and spread joy. Meanwhile, cantankerous ghost Scratch lives to make the world a worse place, break what has gone right, and spread misery. When a curse from Scratch backfires, he finds himself forever bound to Molly. Despite that, Scratch and Molly form an unlikely friendship that guides each of them through the ups and downs of their respective worlds.