The story is inspired by "A Passed Moment." In the original, Black Jack finds on a taxi driver's back a scar from an operation that indicates that the surgeon is more skillful than even Black Jack himself.
This story is based on the Manga episode "Promise". In the original story, Black Jack gives first-aid treatment to a revolutionary soldier sheltered at a refugee camp where there are no medical supplies or drugs.
Black Jack meets four girls in a northern town. Some months later, he chances upon one of them again and finds out that two of the original groups are dead and another has become a vegetable following an accident.
In the original story entitled "Hurricane," a young wife taking care of her rich old husband, who is dying on a solitary island, and his secretary ask Black Jack to prolong the man's life until they can finish altering his will.