Introducing a very unique TMNT tale starring Casey Jones and April O'Neil, by acclaimed writer Mariko Tamaki. Author of the bestselling, highly praised, Caldecott Award-winning graphic novel, This One Last Summer. Casey and April take a road trip to the southwest to dig up more clues about the mysterious Pantheon that has seemingly been pulling the strings on the Turtles' lives from the beginning. They will find even deeper mystery, unexpected danger, and start a new chapter in their relationship.