Two years after the fall of Museum, the crime syndicate behind Fuuto's Gaia Memory epidemic, detective Shoutarou Hidari and his partner Philip still work cases out of Narumi Detective Office, even as the memories that create Dopants keep surfacing on the black market. An amnesiac woman named Tokime joins the pair as their new assistant, tangled up in the source of the new threats they're chasing. The manga is a direct sequel to the 2009 tokusatsu series Kamen Rider W.