Bai Qi, the owner of the Monster Tavern, is good at mixing drinks. The drinks he mixes can make guests enter dreams. Sommelier Fu Yu comes to the tavern. Just as the two are arguing about Bai Qi's bartending skills, the guests with obsessions gradually enter the fantasy tavern that heals the soul, and enter dreams after drinking the specially mixed drinks. In the dream, Fu Yu transforms into a monster catcher and Bai Qi transforms into a little white dragon. Together with the guests, they experience the most affectionate people and emotional things in the world, eliminate obsessions, get healed, and reconcile with the past. In the adventures, family affection, friendship, love and other aspects of life allow Bai Qi Fu Yu to grow and become close friends who are bound to each other. The play is adapted from the manga "Monster Tavern".