A CD-ROM arrives at Black Jack's house via international mail, offering a reward of over 10 million dollars if he can cure a sick relative. Black Jack is surprised to learn that the patient is 200 years old. At first, Black Jack decides not to go because he has other patients, but he decides to treat the 200-year-old patient. When Black Jack and Pinoko arrive at a remote airport, the sender, Miriam, has come to pick them up. The group boards a jeep and heads to the village where the patient is waiting. When they enter a house on the outskirts of the village, they find an old man in rags sitting in his bed...

After seeing the pearl that Largo has retrieved from the rocks facing the sea, Black Jack heads from the backyard through a cave in the rocks to the cove. Seeing the shining pearl in the cove, Black Jack explains to Pinoko that it belonged to a friend he parted ways with 10 years ago, and begins to talk about what happened back then. 10 years ago, Black Jack treated an injured killer whale that washed up in the cove. As a thank you for the treatment, the killer whale brought the pearl to Black Jack in its mouth. Since then, Black Jack has named the killer whale "Triton," which keeps coming back to the cove after getting injured, and they have grown closer...

Pinoko watches the TV show "Big Mask" and becomes fascinated by the villain Goras. Takao, who plays Goras, is kind to her on location, and she becomes a fan of him. After filming, a staff member notices that Takao's leg is swollen, and asks his acquaintance Sharaku, who promises to introduce him to Black Jack. Takao is admitted to the Black Jack residence, much to Pinoko's delight. Later, Black Jack visits Takao's home. Takao's younger brother, Yukio, overhears a conversation between his mother and Black Jack and mistakenly believes that his brother has been captured by Black Jack...