Takeshi Hongo is a promising young man with a passion for motorcycle racing. However, his dreams are suddenly ruined when he gets kidnapped by Shocker, the evil secret organization planning to dominate the world. After being remodeled into a cyborg, Takeshi escapes and swears to protect the world from the inhuman monsters.

Every era has an individual that begins a journey seeking the way of the road. The numerous adventures they encounter are harsh, relentless, and life threatening. It is the burning souls of these brave individuals that lead human beings to the future. People called them Adventurers. The Search Guard Successor Foundation collects treasures from all around the world that are scarce and about to be lost forever. Among the treasures, the secretive finds that contained dangerous powers were called “Precious”. If these Precious were to be robbed and utilized by Negative Syndicates, people would be put in serious danger. This is why the S.G.S. will form a secret unit to locate and defend Precious. The name of the unit is Boukengers.

A woman in the midst of an unpleasant divorce moves to an eerie apartment building with her young daughter. The ceiling of their apartment has a dark and active leak.

Mike Hama, Private Detective, is a chain-smoking, wisecracking tough guy with a weakness for the ladies and a soft spot in his heart, especially for his kid sister Akane. Mike's so down on his luck he'll take any case, from finding a lost pet to spying on cheating spouses. But every now and then, along comes a client with dubious and dangerous case… and that's when Mike shows his stuff.

A successful businessman and his alcoholic wife attempt to piece together their unhappy lives and shattered marriage. Little do Nagai and Akira know that their precarious relationship will soon be transformed by a stranger, the enigmatic Keechie.