Martha Marcy May Marlene movie plot

Marthais a very beautiful young woman, but because of the charm of a cult, she has stepped into the abyss of evil. After she was hit, she woke up and decided to get rid of this blind worship that was too fanatical and try to live a normal life again. She is eager to get help from her sister Lucyplayedand her brother-in-law Tedplayedwho have always been very estranged , but she is very secretive about what happened to her after she disappeared. However, when the memories left over from the past suddenly triggered terrifying paranoia and delusions, she began to suspect that the cult organization might not let her go easily, and was still looking for her and tracking her everywhere. After that, she couldn't distinguish what was reality and what was the illusion she had imagined   .