After his younger sister Koyori suffers a permanent disability due to an accident, Shiro stumbles across an unusual game called "Strings Dolls" that allows players to manipulate people on their phone screens like puppets. Overjoyed to find that the game can briefly restore Koyori's mobility, the siblings are dismayed to learn that some users are using the power for malicious purposes. A mysterious player named Miyabi is using the game to eliminate others, and Shiro must uncover their true identity and put a stop to their deadly game before it's too late.
