In the United States, you can stream "Marionette" for free (with ads) on these platforms:

Seo-rin teams up with a former detective to hunt down the anonymous "Master". 📺 Where to Watch

The film "Marionette" (2017), also known by its Korean title Remember Me (나를 기억해), is a South Korean crime thriller. The story centers on a high school teacher who becomes the target of a mysterious blackmailer known as "Master". 🎬 Film Overview : Remember Me (나를 기억해)

The blackmail links back to a traumatic event from her own high school years.