A messanger arrives in Port Sumac bringing news of multiple mice gone missing in Frostic. Kenzie, Sadie, Saxon, and Laurel go to investigate, leaving Lieam to finish the paperwork on all the arrested mice. They take Captain Finch’s boat, The Sandy Anna.
Upon reaching the walled community they have to talk their way past a wary Guard Mouse named Dalla. She eventually entroduces them to Kole, the captain of the village. Most of the mice in the community are grouped in the school house to protected each other from further disaster, however there a half dozen mice who have stubbornly stayed in their own homes:
Jasper & Lilly, the innkeeprers,
Nolan & Neolan, twin farmers,
Algomin & Vidar, the archivist/scientist and his assistant,
Folker, the obnoxious smithy,
& “snoring” Serra, the miller.
The team successfully talks Jasper & Lilly to take refuge in the school house, but that night Neolan dissappears after a violent struggle. The following night, the inn catches fire and Kole is missing.
After stopping hte flames, the team discover it was a chemical fire and Algomin was to blame. Following a tunnel discovered under the old mouse’s bed the Guard track him into an underground chamber under an old locust tree. There they discover he has been the pawn of a weasel named Voza. Algomin, not seeing the weasel but only hearing her voice, had thought it divine and was sacrificing mice to The Voice.
The Guard Mice best the weasel, but she and Algomin escape in the darkness, Voza vows to prey on other cities.
The Guard find Kole still alive, but badly wounded. He is the only survivor of Voza. The mice then return to town to clean up the aftermath.