Mermaids have been sinking ships and drowning humans for centuries, and now the government is determined to put an end to the mermaid problem—by slaughtering all of them. Luce, a mermaid with exceptionally threatening abilities, becomes their number-one target, hunted as she flees down the coast toward San Francisco.
There she finds hundreds of mermaids living in exile under the docks of the bay. These are the Twice Lost: once-human girls
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