New recruits aspiring to become GSA agents are required to go through several weeks of rigorous training to weed out those unsuited for the job while preparing those with potential to rise to the challenge. With a few new faces joining the agency, Tony Cross and his team gain a powerful ally just in time to investigate a series of murders. Philadelphia appears to have a serial killer with a gruesome M.O. plaguing its streets. There are also a number of attempted murders being perpetrated in tandem, by a reluctant killer in the making. Both suspects seem to have a connection with an imprisoned demon from Tony’s past and the team needs to catch both of them before more victims emerge, all while training the newest addition to their group.