The Theta Girl
When her friends' all-girl rock band plays, Gayce sells a hallucinogenic drug called "theta." This helps her friends get more people to come see them play. When Gayce's friends are brutally killed, she must figure out who did it and protect herself from the killer. She learns about the connection between theta and the murders, and it's a very scary thing that she finds out. That the world, and even her whole reality, isn't what it seems.