When Shakira Smith is brutally raped on her nineteenth birthday, her three quick-to-pull-a-trigger older sisters vow to help her get revenge. But getting revenge turns out to be the least of their worries. They find themselves struggling with questions of sexuality, weighed down by trust and intimacy issues. That along with they are caught in a feud with a deadly Chinese mafia. Am I my brother's keeper? is a question. Sisters' Keeper is a fact. There is no greater bond to have, and no deadlier line to cross.