Lucy Moon is the kind of girl who loudly supports animal rights—during hunting season. She wearsa woven hat made of hemp in support of third-world workers. Lucy Moon is the kind of girlwho spots injustice and isn’t afraid to fight it. So when classmates land a trip to the police station for sledding on Wiggins Hill and the local paper refuses to report it, Lucy takes up the battle. Ms. Wiggins, the town’s wealthiest resident, and owner of Wiggins Hill, becomes Lucy’s most formidable adversary. Soon, Lucy is embroiled in a battle for justice that leaves her wondering whether the struggle is worth it, and whether one person can really make a difference.

The Aldens are preparing for a yard sale when they find an old wooden mask in the trash behind a neighbor's house. Violet notices that the mask looks like a Native American mask that she had read about. When the mask is stolen, the children begin to think their newfound treasure may be worth a lot to someone. Can the Aldens find the thief and the mask before it's too late?