The SWAT team works with Lt. Piper Lynch to hunt down a serial bomber who is using drones as bombs. Meanwhile, Hondo's first day as a legal guardian to Darryl becomes complicated when his father unexpectedly moves in.
The mayor asks Lt. Lynch to enact a department review of the SWAT team while hunting down a fugitive leader of an infamous doomsday cult. Also, Luca asks the team to invest in his new passion project: a Guatemalan food truck.