In some deep financial trouble and hot on the heels of loan sharks, Es stumbles upon a real beauty, Aika, who's out cold and hanging onto a sparkly diamond. The twist? Aika can't remember a thing and begs Es to help her out. She promises a reward in return. With a bit of help from a Vet who's a buddy of Es, they figure out something wild: Aika's memory only comes back right before she's about to kick the bucket, like a whole-life flashback. To help Aika remember her past, Es faces an extraordinary dilemma; he must somehow bring her to the brink of death, yet simultaneously ensure she remains alive.