Seven students who have passed the extremely difficult selection test to become pararescue jumpers (commonly known as PJs/pararescue jumpers) belonging to the Aviation Rescue Group, an expert unit for saving lives, are lined up. Sawai Jin (Kamio Fuju), Fujiki Sayaka (Ishii Anna), Shirakawa Tomoki (Maeda Kentaro), Hasebe Tatsuya (Watanabe Aoto), Nishitani Randy (Keita Kusama Richard), Tokairin Yuuki (Inukai Takatake), and Kondo Mamoru (Maeda Oshiro) -- the members who passed through the narrow gate and will be training to become PJs at the Rescue Training Unit. As the seven students listen to the instruction of the training unit leader, Horikoshi Shoichi (Shishido Kai), with nervous expressions on their faces, they suddenly hear the sound of a helicopter approaching. The seven surprised students and instructors including Nishina Ren (Hamada Gaku) look up to the sky, where a rescue helicopter, a UH-60J, begins to hover.

While the students continue to challenge their limits while being pushed both physically and mentally, they finally start training in the pool. However, even Fujiki Sayaka (Ishii Anna), who has the ability to have competed in the National Athletic Meet in swimming in the past, continues to struggle. Pushed to her limit in training that simulates a harsh rescue site at sea, Sayaka is attacked by a fear of water. The more Sayaka struggles desperately to recover, the more she panics...? After completing the training, her classmate Sawai Jin (Kamio Fuju) offers her words of encouragement, but Sayaka can't hide her irritation, saying, "Don't look down on me just because I'm a woman."

As the harsh comprehensive sea training approaches, the training begins in the pool, where they patrol three air stations set up underwater while barely keeping themselves breathing. Then, Hasebe Tatsuya (Watanabe Aoto) loses consciousness as he becomes short of breath. Shirakawa Tomoki (Maeda Kentaro), who sees this, is overcome with tremendous fear... Shirakawa grew up in an orphanage and aimed to become a pararescue jumper in the hopes of becoming a hero to his fellow students at the facility. He was the top student when he passed the exam, and was relied on by the other trainees. Shirakawa pretends to be calm and behaves bravely, but he has flashbacks of the faces of Sayaka Fujiki (Anna Ishii) and Hasebe, who drowned during a previous training session, and he can't stop trembling.

Usami doesn't want to let his personal feelings get in the way of his training, so he asks his daughter Yuna (Yoshikawa Ai), who is here to cover the Air Rescue Team, to keep quiet. Unaware of this, Yuna is excited to accompany the students on the mountaineering training! She tells Sawai that she will "follow you to the end." Finally, the day of the mountaineering training arrived, and in the harsh conditions of only being able to drink 2 liters of water for two days, the training is a life-risking training in which the students search the mountains with 30 kg of luggage and retrieve the person in need of rescue by helicopter. Usami appoints Kondo Mamoru (Maeda Oshiro) as the leader in charge of selecting the search course and setting the pace for the team. When the training begins, Kondo's experience as a member of the mountaineering club in university comes in handy

They were relieved that they were able to get through the harsh training with their strong bond while supporting the injured Shirakawa Tomoki (Maeda Kentaro), the unwell Tokairin Yuuki (Inukai Takato), and the unconscious Fujiki Sayaka (Ishii Anna), who was unable to walk on her own. However, that night, the instructor Usami Seiji (Uchino Masaaki) said, "Fujiki Sayaka, 3rd Class Airman. You've done well so far, but this is as far as you can go." The seven were shocked by his words. However, they were given a chance to take on the same training again, and the students re-energized, saying, "Let's do it together again!" Meanwhile, Sayaka, who was looking gloomy, confided to Usami that she had no confidence. Still unable to fall asleep, Sayaka sneaks out of the tent and stumbles along the dark mountain path...!?