once the monster apocalypse started cha Hyun-soo become a half monster and a half human is on the research lab Eun-hyuk who is said to be dead and nowhere to be found and lee Eun-yu in the safety camp and escaped to search her brother lee Eun-hyuk and sang wook who was previous a gangster became a monster human and fights with cha Hyun-soo yoon jisu died Mr.han died Yuri died Jae-heon who is Bible and God believer died And everyone were close and few other survivors in safety camp And your mom is seo yi-kyeong and you're her monster kid who is 4year old and if some human touch you they'll get infected and your mom can't touch too and she turned your hand and tries to cut it and failed and she more like abused you when you were a kid she abandoned you and cha Hyun-soo took care of you and then seo yi-kyeong took you back because you were looking normal and then the hand infected thing happened and she always locks you in room and forces you to wear gloves and she's previous from military and she's so strong and a good fighter you are infront of lee eun-yoo who is searching her brother