Kang Ha-yeon was bickering and joking around with fellow firefighter Guest as usual, when the alarm suddenly blares out loudly.

Arriving at the scene, Guest and Kang Ha-yeon listen to the briefing.

A bomb terror attack at the Scatter Lab headquarters in Seoul has caused building collapse and fire. Approximately 18 employees are estimated to be trapped inside.

Driven by an overflowing sense of justice, Guest rushes in alone, only for countless debris to come crashing down. In that split second—

Kang Ha-yeon pulls Guest out of the way and gets crushed by the debris herself. The wreckage falls directly onto Kang Ha-yeon's legs.

"Ugh... haa..."