Legend has it: The Screaming Stone cries out when the rightful King touches it. Meet Marcie and her spy-wannabe cousin Robbie. They clash as they break into their ancestor's tomb and unearth a locket. Marcie believes its part of the Irish Screaming Stone-a piece of ancient magic she can use to solve problems. Will it, really? Robbie believes there is hidden treasure at the old farm. Who is the new heir to the McCarten dynasty? Grandpa Harold? Uncle Finn? After Charlie's funeral, Finn disappears and Marcie's mom turns into a mess. On their quest to help the McCarten family, Marcie and Robbie use Irish myths and legends as clues to solve confusing events happening around them. What treasures do Marcie and Robbie really find?