As the summer vacation commences, Ronnie Anne eagerly celebrates her 12th birthday. Alongside her closest friend, Sid, she plans to spend an exhilarating day at the newly opened Xtreme skate park. However, her family has a surprise of grand proportions awaiting her back at home. They have made the decision to embark on a long journey to Japunda, Mexico, the birthplace of Mama Lupe. This trip coincides with the vibrant New Fire Festival, allowing them to immerse themselves in the festivities and gain insight into the captivating Michoacán culture. Additionally, they stumble upon an ancient legend surrounding a preteen demigod, a tale that becomes intertwined with Ronnie Anne's life as she befriends the demigoddess, leading to a series of chaotic events.