"Taxi Driver 2" episode 4 delivers an unexpected twist with Shin Jae Ha's character. Meanwhile, the Rainbow Taxi team mission, led by Kim Do Gi (Lee Je Hoon) ended successfully.

Unfortunately, the action crime series encountered a slight dip in ratings.

'Taxi Driver 2' Episode 4 Viewership

After three consecutive increases in ratings, Nielsen Korea cited that "Taxi Driver 2" episode 4 fell short in viewership.

Based on the daily chart, the weekend K-drama landed an average nationwide rating of 11.3 percent. It is a significant decrease from its previous of 13.2 percent, which is also their highest rating yet for the entire season run.

IN CASE YOU MISSED IT: 'Taxi Driver 2' Episode 3 Rose to All-Time High Viewership + Lee Je Hoon is on to New Adventure

Viewers will get to watch "Taxi Driver 2" episode 5 on March 3 via SBS and Viu TV.

'Taxi Driver 2' Episode 4 Recap

The fourth episode began with Kim Do Gi doing his undercover as one of the town locals. He made his way after the group of fraudsters' truck broke down and told him about the nearby service station which happens to be his.

Interestingly, this is where the Rainbow Taxi team began their mission, to investigate the identities of the group. Ahn Go Eun, the resident tech wizard was able to keep an eye on their activities.

One of their goals is to bring the group's focus to Jang Sung Chul who is disguised as an old man.

Fortunately, the group leader saw how wealthy the old man is - from owning a Porsche to having Gucci loafers to using an expensive gold club on the firewood and more.

With this, Jang Sung Chul became their next target.

One of their tactics is to trigger the group leader's greed through Ahn Go Eun's undercover as an entertainer.

The team made him think that Ah Go Eun was able to get his wealth, specifically the Porche after she mentioned to her that she knew his plan.

In one scene, the group saw the old man burying loads of cash on the ground. This prompted them to investigate more about Jang Sung Chul and found out that Kim Do Gi is close to the old man.

They borrowed his tractor to help them dig the cash along with a red flag market.

Unfortunately, the group leader stepped on a mine, which made him impossible to get out of the area.

As for the victim, she was able to pay off the debt, thanks to Kim Do Gi and his team.

In addition, she also met her son and his grandson who visited her at her home.

Rainbow Taxi team made another successful vengeance but it seemed like their new member is a troublemaker after he accidentally found the secret passage to the team's hideout.

Will On Ha Joon be one of them or their enemy in the future?

READ MORE: Was Lee Je Hoon Verbally Harrassed? Radio Show Removes Inappropriate Remark Towards the 'Taxi Driver' Star

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Written by Geca Wills