Obsessed Jensoo/2soo

Kim Jisoo works for a finance company and is married to Kim Jennie, with whom she has a two-year-old daughter, Hayul. While Jisoo is at work, she befriends a temporary worker, Hong Suzu a.k.a Soo Joo, who, believing Jisoo was flirting with her, tries to seduce her. Although Jisoo repeatedly rejects her, Soo Joo continues to pursue her, and makes sexual advances on her at the office Christmas party. Later, she follows Jisoo to her car and flashes her until she forces her out of her car. Jisoo intends to report Soo Joo to her firm's human resource management, but learns that she has quit her job.

Thinking that Soo Joo has given up, Jisoo is annoyed when she receives flirtatious emails from her. Jisoo and her workmates visit a resort for a conference, where she confronts Soo Joo, who spikes her drink. Incapacitated, Jisoo followed by Soo Joo into her hotel room. She confronts Soo Joo again the following day, and hours later discovers her lying naked on her bed after attempting suicide, and calls for an ambulance.