Seasons & episodes

S1 · E1Forewarned Murder 2018-05-04 · 98 min＋

A man named "M" invites seven people to a murder game party. Among the eight in the room, one will become a victim, and another the culprit.

S1 · E2Treasure Island 2018-05-04 · 84 min＋

Recognized for their performance, the detectives report to Jeju Island, where their first client asks them to participate in a treasure hunt.

S1 · E3Kwang-soo, a Murderer 2018-05-11 · 77 min＋

While enjoying their break on Jeju Island, the detectives get a shocking call from K, who says Kwang-soo is a prime murder suspect and is on the run.

S1 · E4Messages from the Dead 2018-05-11 · 75 min＋

Jong-min comes across a diary of a dead teen girl who was possibly murdered. To find the truth, he gathers the detectives at the school she attended.

S1 · E5The Last Vampire 2018-05-18 · 86 min＋

A woman turns up dead on an island off the coast of Incheon. The detectives learn that a centuries-old legend of a vampire has haunted the islanders.

S1 · E6Battle of the Detectives 2018-05-18 · 86 min＋

To find the missing self-portrait of a recently deceased painter, two rival curators at a Seoul art museum each commission a team of detectives.

S1 · E7The Vanished Magician 2018-05-25 · 86 min＋

Without any cases to solve, the detectives enjoy watching a magic show rehearsal -- until the show's star magician suddenly disappears without a trace.

S1 · E8The Mysterious Gentleman 2018-05-25 · 86 min＋

A man who introduces himself as K's old friend offers the detectives lavish pay and a chance to partake in a special mission -- but there's a catch.

S1 · E9Operation: Criminal Transport 2018-06-01 · 83 min＋

A culprit asks specifically for the detectives to escort him to the police station. In exchange, he promises to tell them everything they want to know.

S1 · E10The Disappearance of K 2018-06-01 · 78 min＋

The detectives receive a text message from K that was written three months ago. It asks them to come to Incheon, where their final test awaits.