Geum Bi, an 8-year-old girl with Niemann-Pick Disease Type C (NPC), faces rapid mental and physical decline due to her rare condition. Her single father, Hwi Cheol, a swindler, learns to appreciate life while caring for her. Geum Bi’s estranged mother, Jang Joo Yeong, disapproves of Hwi Cheol. Arborist Go Kang Hee, who prefers solitude and searching for stolen artifacts, becomes drawn into their lives. Can Geum Bi help heal Kang Hee’s