A team of experts, including an archaeologist, a psychiatrist, and a pharmacologist, gather to investigate the mysterious and sacred properties of the salvia divinorum plant. Through a series of controlled experiments involving volunteers, the group explores the plant's mind-altering effects and its historical significance to the Mazatec people of Mexico. As they delve deeper into the subjective experiences of the participants, the team grapples with the complex interplay between perception, reality, and the cultural context of this powerful natural hallucinogen.