Marlenka, a biology student, having completed her third year with honors, decided to start practicing on her own plot. Getting down to business with ardor, she planted a plant unknown to her, which two years later grew to be three meters tall. Concerned neighbors recognized the unknown giant as the most harmful bamboo, ready to fill the entire living space, and asked Marlenka to destroy the dangerous plant. While trying to dig up bamboo with its roots, Marlenka suddenly came across a human skeleton without a head...