Dr. Henry Jekyll is a respected scientist and physician in Victorian London, deeply committed to his fiancée, Beatrix Emery, and fascinated by the duality of human nature. Despite warnings from friends and colleagues about tampering with the human psyche, Jekyll obsesses over his controversial theories that every individual harbors a good and evil side. He develops a serum he hopes will separate these two aspects, allowing each to exist independently without harm. Jekyll's curiosity and ambition drive him to test the potion on himself, leading to the creation of his malevolent alter ego. His transformation into this sinister persona unleashes a wave of chaos and moral depravity that poses a grave threat to those around him.

Transformed, the once-gentle Dr. Jekyll becomes the brutish Edward Hyde, living a dark existence in London's seedy underbelly. Hyde soon becomes entangled with Ivy Peterson, a barmaid who is both intrigued and terrified by his violent tendencies. As Jekyll struggles to control his darkest impulses, his two identities begin to blur, threatening his relationship with Beatrix and putting everyone he knows at risk. Haunted by his actions as Hyde, Jekyll desperately seeks a way to free himself from the monstrous double life that imperils his future and moral integrity. The tension escalates as Jekyll realizes his ability to transform at will is slipping, with disastrous consequences looming on the horizon.