After the discovery, in Egypt, of the City of Gods, Isabel, an archeologist, sets off in search for another quest, this time of inner nature, traveling through different places on the planet. In this pilgrimage a secret will be revealed based on a sacred Key. The Key that will release the power to save the world. Throughout the memories of her past lives, which take her from Atlantis to Egypt, passing through the Inca Empire, Isabel begins a journey through the paths of her own Soul. From Mount Shasta in the United States to Roncador Mountain in Brasil, from Uritorco Hill in Argentina to Machu Picchu in Peru, Isabel reunites with herself, finishing this pilgrimage in the Heart of the World. There, the three stones of the Grail will be reunited once again, and the most hidden secret will be revealed!