From Raina Telgemeier, the #1 New York Times bestselling, multiple Eisner Award-winning author of Smile, Drama, and Sisters! Catrina and her family are moving to the coast of Northern California because her little sister, Maya, is sick. Cat isn't happy about leaving her friends for Bahia de la Luna, but Maya has cystic fibrosis and will benefit from the cool, salty air that blows in from the sea. As the girls explore their new home, a neighbour lets them in on a secret: There are ghosts in Bahia de la Luna. Maya is determined to meet one, but Cat wants nothing to do with them.