The discovery of X-ray photographs of sexual intercourse causes trouble at a hospital. The hospital administration is more interested in who might be in the x-rays than who took them. A nurse, Yeo Yoon Young, is writing her resignation because she thinks it might be her, but when she arrives at the hospital no one else is there except the deputy. While this hospital commotion is going on, strange sinkholes start to appear in Seoul. Young laborers, including Yoon-young’s boyfriend, are mobilized to fill these sudden sinkholes.