Kim Jongin is the only one who knows.

He lives in a city, surrounded by walking puppets, but no one knows it.

He was able to cut off the strings, but what was the point if he continues to follow the same routine every day, as if he never even cut the strings.

When Jongin meets  this new foreign boy, Luhan, he finds himself wanting to be with him all the time, putting him at danger.

What will happen when the city's government decides it's time to tie the strings on Luhan?

Will he remember Jongin?

Will Jongin be able to save him?