E2, Ryu Tae-suk and the samples go missing. Seeing a familiar name on the intruder, Ji-an follows her down the vents for answers.
Casts:
Bae Doona, Gong Yoo, Lee Joon, Kim Sun-young, Lee Moo-saeng, Lee Seong-wook, Jeong Sun-won, Choi Young-woo, Cha Rae-hyung, Yoo Hee-je, Yoo Sung-joo, Kang Mal-geum, Kil Hae-yeon, Heo Sung-tae, Kim Si-a, Choi Hee-jin, Kim Bo-min, Kang Ji-woo, Gong Jin-seo