Fantastic Storyline, Less than Stellar Finale

This drama had everything going for it. A unique storyline, decent characters, a bit of mystery. Up until episode 15, the plot of the series makes this a 9.5/10 for me. However, due to one of the messiest final episodes I've ever seen, this dropped to a 6.5/10 for me.Sad ending or happy ending, it doesn't matter to me. I may cry buckets if an ending is sad or grin with happy endings, but what matters is that it's a GOOD ending. When a final episode is as messy as this one, it makes me feel weird and feeling like there's something missing.