The LAPD, FBI and Interpol work with Monica Stevens in Prague to target high-value terrorists operating within and outside the United States.

When the president visits Los Angeles, the LAPD teams up with the Secret Service to ensure his safety and assess any major threats on their watch list. Meanwhile, Miles's instincts are tested, and Tim takes on a new role.

Nolan makes a quiet arrest, and Lucy and Celina race to rescue a kidnapping victim. Meanwhile, Harper and Lopez help outsmart a hugger, and Miles visits a familiar face.