Vic's and Monica strike a deal with the DEA to shut down Antwon Mitchell's tar heroine operation. When the bust comes up empty, Vic's suspicious of Shane grow - until Shane proves himself by coming up with a key piece of evidence that reveals a large stash of tar, which is being stored at a local church. Dutch and Claudette's friendship continues to feel strain as they try to tie a young woman's murder to a suspected serial killer. Julien takes a stand against Monica's policy, then goes to David for support when she suggests he consider transferring out of Farmington.