In this episode, the Tokyo Fire Department is on high alert due to a flood disaster. The focus is on a tense rescue operation involving firefighter Daigo and his team. They are attempting to save people trapped in a flooded area, including a grandmother named Mako and her grandchild.

Daigo, feeling powerless, is determined to rescue the trapped individuals. His colleague Igarashi cannot establish radio contact with another team member, Toake, making the situation even more urgent. The team struggles with the siphon technique, which is crucial for removing water from the flooded area. Shun, another team member, finds a solution using breathing masks that create positive pressure, proving to be a critical part of the rescue strategy.

The team faces various challenges, such as securing waterproof tarps and handling the siphon pumps. Shun, in particular, plays a pivotal role by using his quick thinking to keep the tarps in place with the help of the water current. Gradually, the team's efforts pay off: more and more water is pumped out, and the rescue of the trapped individuals draws closer.

Amid the rescue operation, the episode delves into Daigo's personal background. It reveals his troubled past, including the fact that he was bullied and ostracized due to his father's actions, which were linked to a tragic incident at the Hotel New Snysis. Daigo is shown grappling with his guilt and fate, even questioning his own will to live.

A character named Asahina plays a significant role in Daigo's life. He urges Daigo to join a Tokyo Fire Department rescue team and sets an ambitious goal for him: to save 140 lives before retiring at the age of 35. This mission is portrayed as a form of redemption for Daigo, offering him a chance to make amends for his past.

The episode reaches its climax as the team prepares to open the gate to the flooded area, and Daigo explains to Mako and her grandchild how to brace themselves for the incoming water.