New York, 1955. The city has become a very dangerous place. The mafia is trying to seize power. Recently, however, a new and far more terrible player has entered the crime scene in the Big Apple.

Over the last few days, five much-feared mafia bosses have disappeared under mysterious circumstances. A strange liquid and a butterfly were found at the scenes of their disappearances.

But this isn't what has the citizens of New York so scared... Children have also started to disappear in the city. And all of those children drew exactly the same butterflies before they vanished. Detectives and journalists alike have started their individual investigations. Can you figure out what is going on?