Confusing 'til it is not

Watching the first episode of this drama without reading the synopsis for the said episode is honestly confusing. I do not know if the FMC is having a flashback with the weird contrast of the personality from one scene to another scene. I was about to get bored but something happened right when I was about to stop watching and everything about what this episode is trying to present just fell into place and I am hooked!So my advice for the people who are about to watch this? Hang in there!?