With World War II at an end, Charles Hayward is finally free to marry the woman he loves, Sophia Leonides. However, she refuses - the unexplained death of her grandfather, wealthy businessman Aristide Leonides, draws her back to the suffocating environment of her family home.
After the success of his first assignment from the UNICORNE agency, fourteen-year-old Michael Malone is given another unexplained mystery to solve. When UNICORNE detect strange goings-on in a comic book shop, Michael is sent to investigate - a task which is made all the more difficult by allies he can no longer trust, and an enemy he can't actually see .