TVING's first original series, "High School Mystery Club," is packed with mysterious adventures at Saera Girls' High School. Park Ji Yoon, Jang Do Yeon, Jae Jae, BIBI, Choi Ye Na, transfer to Saera Girls' High School on the same day. Their story begins as they join the High School Mystery Club for the Creative Experience Activities. Five girls unravel and solve situations thrown at them in suspense. Will these five transfer students make it out alive?