Aimee Laurence

A large explosion sends Chicago into chaos; the members of the firehouse are tested when one of their own goes missing in the blast.

Laurie's resolve is put to the test in the wake of a brutal hate crime. After his latest initiatives to maintain the peace in Mapleton on fall short, Kevin turns down an outside offer to rid the town of its problems. Matt brings his pulpit to the street. Meg takes on a new role.

As Voight and his team search for the bombers, they realize there might be more bombs set to detonate; Burgess' niece fights for her life.

When Burgess realizes that her sister, Nicole, never made it home after a night out with friends, the members of the intelligence team make finding Nicole their top priority.

The investigation leads Intelligence to one of Chicago's wealthiest families after a nighttime photographer is murdered over a piece of mysterious footage; Burgess' sister Nicole visits the district and presents an icy attitude toward Ruzek.