Hong Lin, who has been shrouded in bad luck for a year, firmly believes that filling in the wrong answers on the recruitment exam will lead to so many tragedies. For example: after learning that his ex-girlfriend got married and died as a child, he met a boy with no name but only a number, claiming to be here to help him go back to the moment when he filled in the answers. Hong Lin traveled back to certain times in the past with the help of the boy, but there is a time cycle to the time back in the past, and the boy cannot follow this time cycle. The boy said that the person who provided this information was his teacher, a Kabbalist... But this person never appeared...