A residential building is placed under isolation when a zombie infection starts spreading between residents, but the situation worsens after they uncover a serial murderer living among them. The Title: Happiness Cast: Han Hyo-joo as Yoon Sae-bom Park Hyung-sik as Jung Yi-hyun Jo Woo-jin as Han Tae-seok Lee Jun-hyeok as Kim Jung-kook Park Joo-hee as Lee Ji-soo Baek Hyun-jin as Oh Joo-hyung Moon Ye-won as Woo Sang-hee Park Hyung-soo as Kook Hae-seong
