아카마츠 운송회사의 트럭의 앞바퀴가 운행중에 빠져 길을 가던 한 여성이 빠져버린 트럭 바퀴에 사망하게 되자, 운송회사는 매스컴으로 인해 세간과 유족의 분노의 대상이 된다. 트럭 제조사의 자체 조사결과, 일상점검 중의 부실 정비라는 오명을 쓰고 운송회사는 세간의 비난과 자금난 및 경영난에 맞닥뜨리게 된다. 하지만 독자적으로 조사를 하던 중 비슷한 사건 및 사고가 다수 있었음을 알게 되고 트럭 제조사인 대기업에서 감추고 싶어 하는 구조적 결함이 있음을 알게 된다. (2018년 제19회 전주국제영화제)
The story is set in a world where a tokusatsu hero TV series "Outer Man" has gained national popularity for 50 years (just like the Ultraman series). One day, a giant alien looking exactly like Outer Man appears in Japan. The truth is soon revealed that, unlike the story in the TV series, Outer Man is an evil alien who has been trying to brainwash Japanese people to invade the earth. The actors who played the hero in the TV series decide to fight against the real Outer Man by transforming into the villain alien in the series, Sylvie Seijin.
Eight years after saving the SPD from Agent Abrella's scheme, the Dekarangers parted ways with Ban joining the Fire Squad, Jasmine marrying Hikaru Hiwatari, and Swan working independently while Tetsu, Hoji, Sen, and Umeko continue working under Doggie Kruger. But after an incident occurred that hospitalized Kruger on planet Revaful wherein he was labeled as a dirty cop for an apparent dealing with the Qurlian Crime Family, which went awry with the death of a civilian witness, Tetsu takes over the Earth Branch. Two years later, joined by rookie officers Assam Asimov and Mugi Grafton, who had taken over the positions of Deka Red and Deka Yellow respectively, Hoji, Sen and Umeko encounter a Clementian named Carrie who is being hunted by Mechanoids.
Kota Mizutani, a 10-year-old boy whose health worsened after he saw a murder, is brought to Akiko's clinic by his mother Mariko. Kota says that two months ago, he witnessed a man in a park strangling a woman with a cord and was chased by the man afterwards. Hamada, who listens to his story along with Akiko, immediately performs an investigation but cannot find any traces of the crime. However, Kota's testimony gains credence when the body of a woman killed two months before is discovered on a construction site in Kawagoe. Acting on a tip from a citizen who says she had been wearing the same clothes as the victim, the police search the house of Kazuko Shimazaki, a photographer who is often absent. But when Kazuko returns from her trip with her assistant Hirano, it becomes clear the victim is a different person.
