WARNING: The following contains spoilers for Fear Street Part 3: 1666, now streaming on Netflix.
Fear Street Part 2: 1978 explained that the only way that Sara Fier’s curse could be broken was for her hand to be reunited with her body. Cindy and Ziggy attempted this after Alice had found the witch’s hand in the tunnels beneath Camp Nightwing. However, they failed because Fier’s body was not beneath the Hanging Tree like everyone believed. Clearly, someone had moved the body at some point, and Fear Street Part 3: 1666 finally clears up the mystery.
Part 3 of the Fear Street trilogy flipped everything on its head. After 300 years of buildup, the truth was revealed that Sara Fier was not the demon-summoning, innocent-people-possessing witch everyone thought she was. Turns out that Solomon Goode, Sheriff Nick Goode's ancestor, was the one who summoned the Devil to gain power and create success for himself.
Solomon, however, does a good job of hiding his sins, and stokes the dogmatic settlers’ panic about witches. So, when Solomon storms out of the Meeting House grabbing Sarah and declaring that she is guilty of witchcraft, everyone is quick to believe him. Like Hannah Miller says to Sarah, “It doesn’t matter if we did it or not. They think we're guilty so we are.” The settlers string Sarah up right away, only giving her time to confess her sins.
Sarah quickly confesses to a crime she did not commit so that she can save Hannah, her lover, from also being hanged. After Sarah's death -- even though they didn’t know the truth about Solomon Goode -- all of Sarah’s friends believed that she was innocent. Later, after Sarah's buried in a shallow grave beneath the Hanging Tree, her friends return to mourn her and pay their respects.
As Hannah, Lizzie, Isaac and Abigail all stand around Sarah's grave, they decide to move their friend to a new burial site away from the cursed Hanging Tree. “We can’t just leave her here alone underneath this tree. She deserves a proper burial. Let’s move her. Bury her somewhere else, so no one knows where she is except us.”
Sarah’s friends also mark the lock on her chains with the name Fier so that anyone who might find her would know who she was. They also left a garland of red moss around her head which grew exponentially as the years went by, symbolizing Sarah and Hannah’s undying love for each other. As a final act, Sarah’s friends engraved a rock with the words “The witch forever lives.” In doing so, they kept others off their trail, because if anyone discovered the missing body, they would see the rock and assume that the witch had cheated death and resurrected her own body -- which fit in rather well with the lies that Solomon Goode began to tell.
Netflix's thrilling Fear Street trilogy, based on the works of R.L. Stine, stars Sadie Sink, Kiana Madeira and Gillian Jacobs. Part 1: 1994, Part 2: 1978 and Part 2: 1666 are all available to stream on Netflix.