"Mayoiga" centers around a group of individuals who embark on a bus trip to Nanaki Village, a mysterious, utopian settlement rumored to offer an escape from the stresses of modern life. The group, consisting of 30 strangers, each harboring personal secrets and motivations, is led by Masaki, a self-proclaimed guide. Upon arrival, they discover the village is abandoned and shrouded in eerie silence, with no signs of life or infrastructure. The group soon realizes that the village is not what it seems, as strange occurrences begin to unfold.

As the characters explore the village, they encounter bizarre phenomena, including hallucinations, disappearances, and encounters with shadowy figures. Tensions rise as the group struggles to understand the nature of the village and its connection to their pasts. Key characters emerge, such as Mitsumune, a naive and optimistic young man, and Yottsun, a cynical and pragmatic individual who often clashes with others. Lovepon, a volatile and outspoken woman, adds to the group's discord with her erratic behavior. Meanwhile, Masaki's true intentions remain unclear, fueling suspicion among the group.

The narrative delves into the psychological and emotional states of the characters, revealing their hidden traumas and fears. The village appears to manifest these inner struggles, creating a surreal and unsettling environment. As the group attempts to uncover the truth, they face moral dilemmas and internal conflicts, questioning their own sanity and the reality of their surroundings. The story builds toward a climax as the characters confront the village's mysteries and their own personal demons, leading to revelations about the village's purpose and their fates.

"Mayoiga" blends elements of psychological thriller, mystery, and horror, exploring themes of escapism, identity, and the human psyche. The series maintains a tense and ambiguous atmosphere, leaving viewers to piece together the fragmented narrative and interpret the characters' experiences. The interplay between the ensemble cast and the enigmatic setting drives the story, creating a compelling and thought-provoking exploration of human nature under extreme circumstances.