A bored God suddenly decides to create a whole new world called the Abyss in order to solve his boredom. Humanity gets forcibly sent into this world along with other races and creatures where they needed to kill, adapt, improve and struggle in order to just barely survive. Now, the final 100 remaining humans had all been killed and all their hopes has been handed over to Kang Hansoo. Kang Hansoo has received the chance to go back in time into the past to along with the hopes and dreams of all humanity. This is the diary of Kang Hansoo and his path of saving humanity.