On Thranduil, a heartbeat equals wealth, and beating at the same frequency equals death.
When Ella, the "heart hunter" of the Golden Sea, poached the nobles' heartbeats, she crashed into the scene where the former prince Caleb was assassinated! By mistake, their hearts were forcibly bound to the same frequency - they could not be separated within 72 hours, and their blood would boil to 72°C and they would die together!
The sworn enemies became desperate mandarin ducks. On the way to escape, Ella used her mother's taboo "neural eye weaving technique" to rebuild Caleb's right eye, but it triggered a disaster in which the memory was naked. Eli, the doctor who had a crush on her, secretly switched to a life-saving inhibitor out of jealousy, and was regarded by Caleb as "murdered by a love rival."
When his political opponents launched a "city-wide heart rate strangulation", Eli atones for his sins in the most brutal way - stabbing the antidote chip into his heart, then pounces on Caleb to complete the transfer, and the love that was unspoken before his life was extinguished will forever remain in darkness.
The blood of her best friend detonates the thin royal blood in Ella's body! She triggered the metal frenzy of the Rusty Gold Sea to fight back against the enemy. But Caleb's heart reached its limit. Ella cried blood and sealed him into the "72°C constant-temperature crystal coffin" that froze time. Holding the blood-stained nerve cord in her hand, she became the only person in the wasteland who remembered the frequency of his heartbeat. In despair, she waited for the faint glimmer of his heartbeat to rekindle.
