"Vincent Ventura, monster fighter extraordinaire, can't believe the house at 666 Duende Street has attracted yet another creepy creature! In fact, there are several unusual beings, including ghosts and a lady in white with fiery glowing eyes! Is she ... La Llorona?!? And who is the other young woman? The next day at school, Vincent and his cousins meet a new substitute teacher, Ms. Malin Che, who just moved into the haunted house. What is her connection to the creatures? At least this time, the kids have new friends to help solve the mystery: Sayer, who they helped in a previous battle with trolls, or duendes, and Zulema, a witch owl who was the target of evil witches. As the relationship between Vincent and Zulema evolves, becoming more complex and exciting, so too does the current case! Two new beings turn up: a hideous figure dressed as a Mexican cowboy whose face is devoid of flesh and a second spooky woman!"--Provided by publisher.