Akiko Narumi arrives in Futo to be the landlord of the "hard-boiled" detective Shotaro Hidari, who finds himself involved in a case involving an old friend and a Dopant.
After his missing target is killed by another Dopant, Shotaro works with his partner Philip to figure out the truth regarding the killer while being dogged by Akiko and her strange sightings.
Shotaro tries to find the Cockroach Dopant's identity - in order to regain Double's missing Gaia Memories. Meanwhile, Philip tries to reunite the dance partners for their legendary move.
When the search for the Virus Dopant takes an unexpected turn, Shotaro and Philip must work to find the true controller and the reason behind their grudge.