"Being your enemy is your only salvation"
Modern surgeon Xie Yunzhao travels through time and encounters a massacre, and the down-and-out young man he saves turns out to be the future regicide. She relied on sutures to set up formations, and he relied on abacus to kill people, falling in love and killing each other while concealing each other. When the hosta pierced the centuries-old conspiracy, it was discovered that the so-called blood feud was just a tampered page in the long river of time and space.
