The narrative opens with a sense of impending doom surrounding the captain, who is physically deteriorating and haunted by "visions of old Flint himself." His fear is not merely psychological; he is terrified of his former pirate associates. He specifically warns the narrator about the threat of receiving a "death note we call a black spot," a symbolic harbinger of pirate justice. The captain reveals his past as "Flint's first mate" and claims to be the sole possessor of the location of a vast treasure. In a desperate bid for protection, he pleads with the narrator to summon the doctor and "call all hands," promising that if the narrator helps him fend off the "man with one leg and black dog," he will share the riches "upon my honor." However, this request is rendered moot as the narrator’s personal tragedy—the sudden passing of his father—takes precedence over the captain’s frantic demands.
The atmosphere of mourning at the Admiral Benbow inn is disrupted by the captain’s continued "bad behavior," characterized by singing sea songs and "scowling and growling like an old blind dog." The tension reaches a breaking point the day after the funeral when a mysterious, "eyeless and hooded" blind man approaches the inn. Using physical intimidation, the blind man grips the narrator’s wrist with a "deathly grip," threatening to "break your arm" if he is not led directly to the captain. This interaction highlights the predatory nature of the pirates; the blind man is cold, calculated, and entirely devoid of empathy, treating the narrator as a mere tool to reach his objective.
Upon entering the inn, the blind man confronts the captain with chilling authority. He commands the captain to "hold out your left hand" and proceeds to drop a small object into his palm. This action is the delivery of the "black spot," a definitive ultimatum from the pirate crew. The blind man’s departure is as swift as his arrival, described as leaping out the door with "terrible speed."
The impact on the captain is instantaneous and fatal. Upon realizing the meaning of the object—which signifies he has only "six hours left"—the captain attempts to rally his remaining strength. He springs to his feet, but his body, already weakened by his "mortally sick" condition, fails him. He clutches his throat and collapses at the narrator's feet, dead. The passage concludes on a poignant note: despite the captain’s abrasive personality and the narrator’s lack of affection for him, the sheer weight of experiencing the "second death" in two days leaves the narrator in tears, marking a traumatic transition into a world of danger and loss.