Life is lonely in Queen Victoria's London, especially for a talking vole. Chains may be the equal of any human detective, but there's one case he can't solve: where he came from and why he can speak.

Luckily, he has the help of Eldridge, the retired investigator he lives with. Their latest job-a shipload of missing fish destined for experimentation-might provide some needed answers. But when Eldridge is kidnapped, Chains is left without sanctuary at a time he badly needs friends. Especially with profiteers, scientists, and pirates from London's mad scientific underbelly after his hide.

The more clues Chains unearths, the more certain he is that finding Eldridge will also unlock the mystery of how Chains originally came to be, and might even offer him a place to truly belong. But someone he thought he could trust doesn't want that to happen. A talking vole may offer a significant breakthrough, but a silenced one is preferred.