Someone invented the SCM which is a mouthpiece that when worn you become a participant in a "game" where you can become a Master or slave. The slave must do whatever the Master says. A Master can take someone else's slave by a challenge game. You can tell another participant to match and a challenge game (tag, word games, Rock paper scissors, hold your breath, etc.) is chosen. Cheating disqualifies. The winner of the game becomes the Master and the loser becomes the slave. A brother and sister team up and participate. That's all I want to give away.
A few people told me this movie is no good and it's total score here on IMDB is low. After finally watching I thought it was very entertaining. You never know what each next scene will be or where things are progressing.
The acting is very good for the most part. The direction is good except one scene comes up abruptly and it's like there's a scene missing to explain how they got there. There is no nudity but some violence, minor gore & slightly disturbing content. Nothing that bothered me too much and I don't like that stuff.
I say this film is entertaining. I was totally engaged most of the time. Very few slow scenes. I'd watch it again sometime.