As Atsushi and Kyoka struggle on while continuing to believe in the "restoration of the Armed Detective Agency", they obtain information from a certain someone who had given them a warning earlier.

They then infiltrate the Sky Casino, a massive entertainment facility managed by Sigma, a member of the "Decay of Angels".

Meanwhile, Jono and the other Hunting Dogs finally catch up to the white tiger, and dispatch the infiltration specialist Tachihara and the fearsome Deputy commander Teruko to the Casino.

Elude the fangs of the Hunting Dogs and pursue the ray of hope!