Black comedy movie | What on earth is happening at that place, the spring water... Woo-cheol, an extremely timid young man who has been unemployed for 3 years, accidentally picks up a discarded wooden sword at a neighborhood spring water spot, avoiding the eyes of his surroundings and family. He starts performing sword fighting moves, which he barely learned in college club activities, as a playful act. At the same time, the Yak-sa-mo, a group of spring water lovers, were anxious about a series of incidents occurring at the spring water. Through the exaggerated testimony of a member who witnessed Woo-cheol performing sword fighting moves playfully, they mistook him for a great master and considered him the right person to protect the spring water, and began to search for him. Woo-cheol, unaware of all this, gets caught up in uncontrollable events and, amidst rumors spreading like wildfire, meets Hwa-soon, an aerobics instructor. Under her seduction to achieve her goals, he unintentionally becomes the savior of the spring water in front of the Yak-sa-mo.