As Red sets Liz and the Task Force on the trail of an eco-terrorist with a mysterious connection to Alexander Kirk, Tom takes matters into his own hands.

Liz's loyalties are tested as Red takes action on an operation to intercept Alexander Kirk. Meanwhile the Task Force races to find a killer who targets inventors of revolutionary technology.

When Alexander Kirk contracts a mysterious group that specializes in hacking the world's most secure computer systems, Red and Liz see an opportunity to make a move on Kirk's organization.

Red directs the Task Force to track down an individual who provides new identities to criminals on the run. Meanwhile, as Alexander Kirk's medical condition worsens, Liz seeks guidance from Cooper on a crucial decision.

Red pressures Dr. Shaw to locate a former patient. Liz contemplates the implications of her ties to an increasingly desperate and dangerous Alexander Kirk. Mr. Kaplan comes to a critical realization about her future.