While Sarah is struggling with the rumors, Kit also falls into crisis.

Eli officially reports that Kit threatened him after the traffic incident.

When the incident reaches DI Costello, instead of protecting his subordinate, he quickly demotes Kit to desk work.

Unusually, Costello asks Kit to lie that the reason for the demotion is due to an old injury.

This ambiguous handling makes people wonder: why does Costello have to hide? Is he protecting the image of the police force, or covering up a more dangerous truth?

Under pressure, Kit is forced to confess to Sarah. He admits to threatening Eli, but not just out of anger. The truth is that Kit is pursuing an undercover investigation. He believes that a recent case is related to an old case that Becky – Lisa’s late wife – was in charge of. Despite Costello’s warnings to stop, Kit continues to secretly collect files and piece together clues.

Sarah’s confession leaves her in shock. The man she loves is hiding many things, willing to sacrifice his career and love to dig up the past. She is both angry at being deceived and afraid that the trouble Kit brings will destroy both of them.

As for Kit, he is caught between duty and obsession. If he continues to investigate, he could lose his career, or even be targeted by his enemies. But if he gives up, the past will haunt him forever. And Costello, with his unusual cover-up actions, increasingly looks like someone “pulling the strings” in the dark, deliberately suppressing all clues.

This story opens up a new layer of drama: Is Kit really just an obsessed cop, or is he touching on a secret that many people want to bury forever?