Yoon Jae, the most lost woman and daughter due to injustice,
lives in despair day after day and reads the diary he sent from the future.
“Wife and daughter… Can we meet again? ”
The ‘Holy Grail’ given to those who overcome the ‘game’ of ‘The World of the Backside’,
it is said that if you use it, you can reunite with your lost family … In the cruel world where only Gangja survives, Yunjae becomes the only one who knows the future. Will he be able to fulfil his wishes?