《三人规则》既是一部家庭剧，也是一部当代惊悚片，讲述了当 "完美 "失控时会发生什么。

十二岁的麦琪•欧文斯喜欢室内设计，她习惯按照自己的精确计划来生活。但是，在得知托尼（她同父异母的兄弟，与她同龄，有点神秘）需要一个住处后，任何计划的雏形都被打破了。托尼的母亲对鸦片类药物成上瘾，备受折磨。现在她要求麦琪的父亲——也就是托尼的父亲——收留他。除此以外，麦琪还得眼睁睁看着最爱的祖母被阿尔茨海默症折磨。

虽然麦琪可以争取——甚至成功——设计出完美的作品，但在家庭方面，完美是不存在的。这些突然出现的难题动摇了她的世界，麦琪必须学会用开放的心态来应对。

Part family drama, part contemporary thriller, Rule of Threes is a middle grade story about what happens when "perfect" is out of your control.

An interior design enthusiast, twelve-year-

old Maggie Owens is accustomed to living her life according to her own precise plans.

But when she learns about Tony, a mysterious half-

brother her own age who needs a place to stay, any semblance of a plan is shattered. Tony's mom struggles with an addiction to opioids, and now she's called upon Maggie's dad―who is also Tony's dad―to take him in. On top of everything, Maggie must also come to terms with the Alzheimer’s afflicting her beloved grandmother.

While Maggie can strive for―and even succeed in―a picture perfect design, when it comes to family, there is no such thing as perfection. To work through the sudden struggles rocking her world, Maggie must learn the importance of having an open heart.