Boston's worst crimes have her name on them.
In Chinatown, she's known as Hyun Sook.
At her home, she's Mom. On the inner-city ball fields, she's Coach.
To her Irish-cop partner, she's Mick.
At headquarters, she's Detective Li.
To the killer who's carving up convicted pedophiles, and the mysterious man who's trying to snatch kids off the city's panicked streets . . .