Reese and Finch call on a former POI and Zoe to help when they learn that the latest POI may have been pushed to his breaking point by a string of bad luck.
A student is shot by a rival gang member in his high school courtyard; Danny and Baez try to prevent further violence; the principal recklessly takes matters into his own hands; Erin tries to help a friend who is mixed up in an illegal gambling ring.
When a vigilante dressed as a comic book hero is murdered, it's up to Holmes and Watson to find the man's true identity and locate his killer; Morland tries to charm Watson into doing him a favor.