2. Episode 2

A puzzle piece arrives on the same day as a murder, and Hansaem suspects it’s no coincidence.

3. Episode 3

Ena and Hansaem warily work together to solve the case.

4. Episode 4

A prime suspect emerges, but things aren't what they seem.

5. Episode 5

Another puzzle piece arrives, and a new murder case unfolds.

6. Episode 6

The meaning behind the drawings on the puzzle pieces is uncovered.

7. Episode 7

Hansaem makes a shocking discovery and becomes unsure of whom to trust.

8. Episode 8

As the investigation escalates, new suspects begin to emerge.

9. Episode 9

An unexpected suspect is arrested, shocking everyone involved.

10. Episode 10

A stunning truth behind the serial murders is revealed.

11. Episode 11

The final puzzle piece arrives will the team be able to catch the killer in time?