Battle for Happiness S01 E08 Episode 8

"She died for someone's happiness."

Mi-ho finds out that the malicious social media post about her past was Jung-ah’s work and that Chang-hyun was at the apartment when Yu-jin was killed. Mi-ho thinks Jung-ah might have hired Chang-hyun to kill Yu-jin. But after Na-young tells Mi-ho that it wasn’t Jung-ah, Mi-ho is back at square one. Right then, the detectives barge in to investigate Mi-ho for attempted murder of Do-jun.