“The strongest mercenary that couldn’t retire has started working.

‘You’re the daughter of the MH Group chairman?’

The mercenary Baek Shin-woo, who returned to the past, confronts his estranged mother.

The true identity of his mother, whom he had been indifferent to, and the fact that those connected to his death are targeting her…

The war has already begun. ‘Ah, damn it! This hellish subway!'”