KevinToronto:
I had a very different take on that story. I got the impression that the person who died was the CEO of Career Way, Lee Yong-Hoon, and that he was older (despite the death photo). My thoughts are that there was some sort of familial relationship with the current CEO, Kim Hye-jin. Was Kang Ji-Yun adopted into the family after her father died? That is a common plot thread.
My assumption is that the two women were rivals to become his successor. Something happened which led to his death. The blame was placed on Kang Ji-Yun; perhaps by Kim Hye-jin. This has similarities with what happened to Yoo Eun-ho.
No doubt all will be revealed and explained. Why do I get the feeling that there will be a link to Yoo Eun-ho's company?
Interesting theory! I didn't think of that. Yep, this plot thread is common but the chances of such being used is 50/50. Kdramas tend to reuse these.
That would be even more interesting but I hope they don't go in a way where our main leads will have to be seperated trope after finding out the truth from the past.