On a cold winter morning, inside the basement of the 'National Museum of Antiquities', Dr. Jalal, the museum's chief curator, was found dead in his chair inside the 'Secret Archive Room' (Floor -2). The body was discovered at exactly 11:15 AM. There were no signs of violence or struggle; instead, he looked as though he had surrendered to a deep sleep with an ancient manuscript still in his hands.
The archive room is specially designed to protect sensitive manuscripts; it is completely isolated from the outside world and can only be accessed by unlocking a heavy steel door latch. The victim was known for his extreme strictness and for keeping blackmail files that could ruin the careers of his colleagues.
Preliminary investigations indicate that the crime occurred within a narrow time window. All five suspects were present in the building, and each harbored a deadly grudge against the victim. Investigators are baffled: How was the poison delivered to the victim? And when exactly did it happen amidst this complex timeline?