Not all that good

Rating: 6/10 (10 January 2020)

Solid entertainment. I was kept pretty much interested for two hours. I really liked the first one-third: the mix of characters, their personalities and backstories, the beautiful house and detailed interior decor.
Then came the girl who vomits if she lies (frankly ... ew). One expects things to get really good from here - this could be a special ability that helps our detective piece together the mystery. Except it is quickly revealed that there is no mystery and the whole case, motivation process and outcome, is played out in front of the audience before the movie is half through. What?
I held out hope when the morphine overdose was revealed. No throat has been slit, so surely, something is left to solve. Nope. Turns out to be wholly a suicide. We realize everything before this is kind of useless, and follow the main character on her quest to escape culpability (except I did think she was at fault and should be caught, so was not really convinced).
The middle section meanders and loses itself in inheritance drama. A blackmailer appears - is murdered. I frankly could not figure out if the second murder was done to hurt or help the main character - could be either and I did not much care. Only wanted to see the ending where I was sure there is a twist.
The last part of the movie picked up and was almost as good as the first, although the denouement was somewhat predictable (many plot points follow so much hinting as to make them predictable, even if they were not at the start). The black sheep turns out to be ... really the black sheep, I had high hopes that the most like grandson to the grandfather would continue to foster the family's special bond to the main character, nope that was all false. Also: overused motifs of the game Go, being a good person, seeing through if knives are props, etc.
Final note on what I perceive to be the misplaced idea of guilt in this movie. Main character did not directly kill the grandpa but did indirectly cause his misguided suicide. In a civil lawsuit, would she not still be held accountable (somewhat) for his death? So the slayer's rule would still work? Consider also the case for her negligence and that she had champagne.
And in the alternate scenario, even if she was the one to administer what she thought was medicine (actually morphine), she would not be held guilty if it's proven someone swapped out the drugs? (which is possible given the eye witness of the housekeeper).
It is tragic that the old man must die either way. Overall, pretty good/not bad, really good performances by the cast, less than solid plot (if it were more of a comedy it would have worked - alas), too much vomiting, and too indulgent towards the main character who at best I think is a neutral not morally superior person.