Two young women, with intertwined fates centuries apart, must protect the secret of the powerful, all-healing mushroom known as amakuna

1492: For millennia, the medicine women of the Guanches, the indigenous people on the Canary Island of La Palma, have used a psychotropic mushroom to look into the past and the future. But the mushroom has other sacred powers: It can cure disease or injury and it links the fate of those who consume it across all eternity. These secret powers are closely guarded by the medicine women, for they can foresee the destructive forces that would be unleashed if the sacred mushroom fell into the wrong hands.

Present day: Romy, a young doctor at a biomedical research company, sets out alone on a rock-climbing trek near her home in Germany. Halfway through her climb, an unusual panic overtakes her and she blacks out as she falls more than 25 feet from the face of a cliff . . . Coming to, hours later, she finds herself in a cave, remarkably unscathed, with a strange taste in her mouth as well as a vivid recollection of an ancient ritual centered on a sacred mushroom called "amakuna."

Plagued by visions from the amakuna ceremony, including the death of an old medicine woman under a peculiar looking tree and the appointment of a young apprentice, Iriome, to take her place, Romy begins to feel as if Iriome is trying to contact her across the centuries. Identifying the tree from the visions as a Canarian Dragon Tree, she heads to the Canary Island of La Palma to discover the truth behind her visions and her and Iriome's intertwined fates.