Season 1
Tackling different mysteries in each episode of this game show, seven sleuths get closer to solving the biggest one of all: What happened to Project D?
All Episodes
Episode 1
Forewarned Murder
May 4, 2018
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.
Episode 2
Treasure Island
May 4, 2018
Recognized for their performance, the detectives report to Jeju Island, where their first client asks them to participate in a treasure hunt.
Episode 3
Kwang-soo, a Murderer
May 11, 2018
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.
Episode 4
Messages from the Dead
May 11, 2018
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.
Episode 5
The Last Vampire
May 18, 2018
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.
Episode 6
Battle of the Detectives
May 18, 2018
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.
Episode 7
The Vanished Magician
May 25, 2018
Without any cases to solve, the detectives enjoy watching a magic show rehearsal -- until the show's star magician suddenly disappears without a trace.
Episode 8
The Mysterious Gentleman
May 25, 2018
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.
Episode 9
Operation: Criminal Transport
June 1, 2018
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.
Episode 10
The Disappearance of K
June 1, 2018
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.