Episode 1
A bound corpse emerges following a serial arson. The first responders to unite in the investigation.
Episode 2
Two fires break out in different locations. The first responders find themselves in a crisis.
Episode 3
The first responders and the NFS cooperate to uncover clues to the serial arsonist.
Episode 4
The arsonist's final plan gets revealed. Can Ho-gae save everyone from danger and catch the criminal?
Episode 5
When a murder occurs at Myeong-pil's villa, Ho-gae leaves his post and joins the case. Kang Do-ha joins the National Forensic Service.
Episode 6
Do-ha concludes that the death at the villa was an accident, but Ho-gae continues his investigation. Do-ha uncovers the dark side of the neighbours.
Episode 7
An unidentified body is found after a brawl at a junkyard. A crisis arises during the autopsy.
Episode 8
Criminals plan to endanger the NFS building. Can the team safeguard the place?
Episode 9
The police and fire department respond to an urgent call about a horrifying incident regarding organ extractions.
Episode 10
Ho-gae delves into the investigation of Ma Joong-do's murder and reopens a past murder case and prison escape.
Episode 11
Ho-gae vanishes after a caravan explosion. Amidst the chaos, a showdown is drawing near.
Episode 12
Supported by the NFS, the first responders confront the sinister mastermind in a decisive showdown.
