Beware of Mother. She deals in custom-created humans, taking children who've lived through unspeakable tragedies and turning them into weapons or worse. And when Batman couldn't stop her, what happened instead became his greatest shame...and his greatest secret.

Now, Batman is gone. But the heroes who carry on his legacy--Dick Grayson, Red Hood, Red Robin, Bluebird and Cassandra Cain--find Mother's fingers tightening around their throats. While Red Hood and Red Robin attempt to extract the secret of Mother's newest weapon from the Order of St. Dumas and its avenger, the deadly Azrael, Dick and Bluebird set out to rescue Cassandra from her father, the assassin Orphan.