Ran, Sonoko, and Conan are at a yoga weight-loss resort when one of its customers, Atsuko Degawa, dies from poison found in her food. Originally deduced to be a suicide, Conan reveals the culprit as the resort's owner, Tsukiko Satoyama, who had poison laced on the plastic wrap which mixed with Degawa's food when it was reheated in the microwave. After finding the poisoned plastic wrap on her dog, Satoyama confesses and reveals Degawa's negative reviews caused her parents' business to shut ...