Sarah's wish for a new family in an alternate dimension turns her into the main course for her new parents. Sarah, unhappy with her current family, uses a coin to transport herself to a parallel dimension where she finds a seemingly perfect family. However, this new family has a sinister appetite, and Sarah quickly realizes she is not a welcomed daughter but a planned meal. She must find a way to escape this dimension before she becomes their next victim.

The premise of 'Ghosts of Fear Street - Parents from the 13th Dimension' sets up a classic horror scenario where a wish for a better life leads to a terrifying reality. The narrative likely focuses on Sarah's desperate attempts to escape the monstrous family she inadvertently chose. Given the 'Fear Street' branding, readers can expect a suspenseful and potentially gruesome encounter with the supernatural. The story's resolution will likely hinge on Sarah's ability to outwit her predatory new parents and find a way back to her original dimension.