With Lisbon suspended and the rest of the team reassigned, Jane is reinstated as a CBI consultant and forced to work with a new team. During the investigation, Jane conspires to bring his former team back together.

The team investigates a 25-year-old case that seems to involve both Red John and the Visualize group, and Lisbon contemplates her future.

Jane discovers an important clue to Red John's methods as the team encounters four of the suspects, and the CBI investigates the case of a software engineer killed by a drone strike.

When a prominent member of Visualize is mysteriously killed, Jane investigates in the hopes that the case will provide a clue that will lead him to Red John.

With the final clue in hand, Jane attempts to gather the remaining Red John suspects in one place in hopes of finally revealing his identity.