One day, a poor novelist received a party invitation from the wealthy Count D. M.
Yet, that very night, a priceless painting named "Muse" was stolen from the count's manor.
The novelist, suspected as the thief, visited detective Mr. Inference and his secretary Lady Truth as an attempt to prove himself innocent.
Who is the perpetrator?
It seems all participants of the party, the servants, and Count D. M himself have a secret to hide.