Hidden in the folds of the city are the most silent evil and the most desperate resistance.
When justice is speechless and the law is no match for the shadows, people who have been crushed by fate become murderous with their swords.
Every murder case is cold and strange, and every murderer was once a person who was let down by the world.
In the dark web, a "guide" quietly emerged, using hatred as a guide to break people's hearts.
Old shadows remain, new cases arise, the long night never truly subsides, and a deeper abyss is still ahead.
The Strange Case Team travels on the edge of the abyss, specializing in solving the darkest cases in the world.
Captain Lin Chen, with his iron bones and Shen Feng, keeps the whole city safe and sound.
Psychological profiler Ruan Yizhen came from the abyss, uses scars to gain insight into people's hearts, and uses his expertise to dismantle evil.
They are destined partners and old acquaintances who have crossed paths for a long time.
One person remembers the startling moment from a distance, while the other person has long forgotten the young man who had the startling glimpse.
Light and darkness meet, abyss and salvation face each other.
When these two shadows destined to be entangled stand side by side between blood and mystery——
A series of mysterious cases, layer upon layer of people's hearts.
They use their bodies as lamps and their hearts as torches to guard every inch of light in the world in the endless night.
Purpose: to protect the light