Private investigator Black, a pragmatic and skeptical individual, finds himself thrust into the enigmatic world of mysticism when a client presents him with a case involving three inexplicable deaths, all supposedly connected to the infamous Voodoo Priestess, Calypso Mary. Despite his initial reluctance to delve into the realms of black magic and voodoo, a subsequent death directly tied to the mysterious priestess piques Black's curiosity, compelling him to take on the case with the intent of debunking the notion of supernatural involvement.
 
As Black unravels the layers of this seemingly occult investigation, he discovers that the intricate web he's caught in extends far beyond the boundaries of mystical practices. The deaths are not isolated incidents but part of a larger conspiracy orchestrated by an organized crime group originating from Tobago but operating clandestinely in Rogers Park. This criminal syndicate is exploiting immigrant businesses through extortion, and Black realizes that the seemingly supernatural deaths are a mere façade concealing the true machinations at play.
 
Now faced with a dual challenge, Black must navigate the treacherous waters of both mystical intrigue and criminal conspiracies. He strives to unearth the connections between the Voodoo Priests and the organized crime group, determined to expose the truth and put an end to the extortion racket preying on vulnerable immigrant businesses. The investigation takes Black on a perilous journey through the shadows of Tobago's mystical traditions and the gritty reality of organized crime in Rogers Park, forcing him to confront his skepticism and question the boundaries between the supernatural and the criminal underworld.
 
In "Calypso Mary," Black's relentless pursuit of the truth not only tests his own convictions but also leads him into a dark and dangerous world where the lines between magic and crime blur, ultimately challenging his perceptions and forcing him to confront the unexpected intersections of the mystical and the malevolent.