Lewis and Bayliss investigate a homicide at a boarding school. Gee goes to Frank's house to pick him up for a trip to the gun range. Kellerman wants the investigation into corruption in his old arson unit to move along, but he finds out that all the real guilty parties have made plea bargains. Frank's firearm test looked promising. The tiny little voice in Bayliss' head tells him that McPhee Broadman might be their suspect despite the fact that his mother is a powerful judge in Baltimore. A student comes forward and confesses to the student's killing; however, the detectives aren't convinced he alone was responsible. Frank passes the exam and can return to active duty, but as far as he is concerned the real test is in the box.