The night in Binhai City was enveloped in salty mist, and the rhythm of Xu Chen's fingertips tapping the pen was penetrating the pages of Heibang's ledger at the frequency of Morse code. As an undercover drug police officer for three years, she turned her heartbeat into an encrypted signal, and the transmitter under her collarbone trembled with each approaching danger - but one midnight, because Pei Zhi crossed the fingertips on her wrist, it was abnormally extended by 0.2 Seconds. This frequency fluctuation that should not exist can only be understood by Lin Yan from the intelligence department thirty kilometers away: it is a sentiment hidden in the mission code that is older than Morse code.
Lin Yan, a decoding expert who was expelled by the hacker organization, was staring at the beating waveform on the monitoring screen. She had deciphered countless encrypted files, but could not decipher the secrets in Xu Chen's heart. When the Russian mark on the cargo list pointed to the genetic files of the Starfish Orphanage, and when the sound of Pei Zhi's mechanical keyboard was exactly the same as the betrayer's instructions ten years ago, the barcode tattoo on the back of her neck suddenly became hot - it was not only a mark of shame, but also the key to uncovering the truth about the two people's "Symbiote Project".
Cheng Wu's anchor tattoo, Chen Shen's empty ring, and Zhou Mingyu's forensic report, each supporting role contains fatal foreshadowing. On the deck of the Kirigakure, Pei Zhi's scalpel cut open the skin under Xu Chen's collarbone, and Lin Yan held on to the modified pistol in the heavy rain. Their heartbeats exploded into brilliant fireworks on the monitor screen. When all encryption protocols were defeated by the half-beat of the heartbeat, they finally understood: the most dangerous password has never been the long and short tones of Morse code, but the resonant frequency of two souls serving as each other's beacon in the darkness.
Is this espionage romance written with heartbeats a carefully calculated mission or a destined bond? When truth and lies intertwine on the heartbeat monitor screen, can they decipher the ultimate key to love in the long and short tones of Morse code?
Intent: When the rational task is leaked by the heartbeat and the emotional code is revealed, two souls who are each other's beacon in the darkness use dangerous frequencies to decipher the ultimate key of love and faith.