Fifteen years after stabbing a classmate to conjure an imaginary phantom known as Mercy Black, Marina Hess is coming home. She's being released from psychiatric care to live with her sister and young nephew. But in the years since her crime, the myth of Mercy Black has gone viral inspiring internet rumors, stories, and even copycat crimes. Marina is haunted by what she has done and the phantom she imagined. Though she would rather leave the past buried, her nephew becomes increasingly obsessed with Mercy Black. To save him, Marina must face her past and uncover the truth behind Mercy Black. What she discovers is a very real and very deadly horror that will stop at nothing to claim her and her nephew. 　　译文(3): 15年前，玛丽娜·赫斯（Marina Hess）刺伤了一位同学，让他变出了一个想象中的幽灵，名为“慈悲布莱克”（Mercy Black）。她正从精神病治疗中解脱出来，与姐姐和年轻的侄子住在一起。但在她犯罪后的几年里，“仁慈的布莱克”的神话已经在网上疯传，引发了网络谣言、故事，甚至模仿犯罪。玛丽娜被她所做的和她想象中的幻象所困扰。尽管她宁愿埋葬过去，但她的侄子越来越痴迷于仁慈的布莱克。为了救他，玛丽娜必须面对自己的过去，揭开仁慈布莱克背后的真相。她所发现的是一种非常真实、非常致命的恐怖，它将毫不犹豫地夺走她和她的侄子。