Toshimasa Komatsu

Dormant, experimental cells begin to awaken inside their human hosts, turning them into creatures called 'Amazons'. Two Amazons-Jin Takayama and Haruka Mizusawa-transform into Kamen Riders Alpha and Omega, aiming to exterminate the growing threat.

Ryōsuke Sagara is an ordinary salaryman and he works for a mid-size shipping company. He is a good-natured person. His family consists of his wife Maho, high school student daughter and elementary school student son. Maho works part-time at a supermarket. They are a happy family, but Maho and their two children suddenly disappear. There are no clues about their disappearance. Ryōsuke gets the attention of the media and public. He tries to find the truth behind his family's disappearance with the help of his subordinate Mizuho Ninomiya at work.