She lives in a rowhouse between rehabilitated crack addicts, sex offenders, and pensioners raising grandkids - and she does jobs. At odd hours, odd jobs that mean a little bit of safety here, one less predator on the streets there. Tonight, a knock at her door summons her down to the canal. What lurks in the night must prepare: she's coming. Driven by a bone-deep longing for justice, Rock-a-bye is for everyone who ever wanted the strength to protect the people they love.