D'improvviso una notte

During a masquerade party where the spirit of the late Professor Aldrige is supposed to manifest itself, Martin meets the charming Stella, while Diana meets the dark Surya. Both find themselves attracted and disturbed by these encounters, which create embarrassment and tension between Diana and Martin. The next morning, Diana mysteriously disappears and Martin sets out to look for her... Martin searches New York in the company of Stella, frantically searching for Diana and, little by little, puts together the pieces of a plot hatched by a sect of Satanists with the aim of bringing the diabolical Mabus back to life. It's a real fight against time to prevent the irreparable from happening and, just when it seems that everything is lost, an unsuspected ally intervenes to decide the fate of Martin and Diana once and for all...