Face the complicated relationship! Tae-kyeong's first love Chae-bin promises to marry wealthy Seok-dae but Seok-dae is actually in a relationship with his assistant...
Then one day, Seok-dae's assistant Eun-soo comes around to Tae-kyeong who is in despair!
However, Eun-soo looks so much like Hee-soo who Tae-kyeong thought she'd killed.

"Do you want to do it...?"
The fatal seduction of...the "Challenge Game"
Florist Ae-ran (Vicky) and forensics investigator Min-ho (Choi Ryeong) from the Public Prosecutor's Office both have a family that everyone wants. However, Min-ho can't handle bed time so Ae-ran starts a 'challenge game' in which she seduces and has sex with strange men. One day, Ae-ran and Min-ho meet Alex (Choi Hyeon-ho) at a tango cafe. Alex is interested in Ae-ran and approaches her while Ae-ran takes interest in Alex who is more handsome than her husband. Min-ho later witnesses them in action and gets angry when he finds out the man Ae-ran seduced is Alex. Min-ho feels nervous because he finds out Alex isn't just a game partner and approached him for a reason. Min-ho tries to get rid of Alex but Alex chokes Ae-ran and Min-ho even more and feels catharsis. The game they started is turning into a catastrophe...