The cold-faced animal rescue officer Leng Jue and her calm and reliable retired search and rescue dog "Thunder" are recognized as an efficient combination in the industry, so calm that they are almost ruthless. Veterinary medicine student Wen Ling lives with her black cat "Xuan Mo" who can only subtly affect emotions. She hides a secret: she can hear the chaotic voices of animals, which often makes her fall into empathic pain that others cannot understand.
During a rescue, Leng Jue's professional restraint methods aroused Wen Ling's overwhelming fear from animals. The two had a fierce confrontation and broke up unhappy. However, animal incidents in this city are becoming more and more bizarre: birds gather abnormally to warn people, and legendary "ghost dogs" lead the way...
Destiny forces them to join forces again and again. Leng Jui discovered that Wen Ling's incredible "empathy" could accurately point to the key to rescue; Wen Ling also saw the gentleness of "Thunder" under Leng Jui's icy appearance. They even discovered that their pet companions seemed to have extraordinary abilities.
After experiencing many unimaginable crises together, the two people fighting side by side gradually became the tacit partner who understood each other best. Leng Jue finally learned to listen to the world in Wen Ling's ears, and for the first time, Wen Ling clearly heard the violent roar for her under Leng Jue's seemingly calm heartbeat.
