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A novella titled Incident in a Quiet Street by Pavel Vezhinov was the basis for Marianna Evstatieva's Crime in Yellow, and for an earlier, 1956 film of the same story by Peter Vassilev. A group of young children in modern Sophia realize that one of their companions has disappeared and their joint detective work zeroes in on only one conclusion: the little boy was kidnapped by a man in a yellow car. As they narrow their leads, they find out that the "missing" boy was really in a car accident that involved a driver who was a doctor. Instead of taking the boy to the hospital as was necessary, the doctor took him home to nurse him back to health because he did not want to make a report on what happened. Once the troop of little Nancy Drews discovers the truth, they innovatively kidnap the doctor's daughter to exchange for their friend - and they do not stop until their objectives are attained, one way or another.