The team tracks an arsonist through a radical environmental group that uses fire to spread its message.
Tension mounts between Jane and Maura; Jane and Maura investigate the death of a college student; Angela is upset by Frankie Sr.'s news.
After finding a ghost's daughter, Melinda realizes she must help them acknowledge their shared past in order for the mother to cross over.
A thief steals Clark's badge and uses it during muggings; McDowell investigates a murder involving a pregnant teenager.