Purple Hyacinth is a Manga/Manhwa/Manhua in english language, Manhwa series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

Her ability to detect lies has made her an outstanding officer of the law – despite being haunted by her inability to save the ones she loved from a gruesome fate many years ago. Now, she uses her powerful gift to defend the defenseless at any cost - even if it means teaming up with a deadly assassin to fight evil in a world gone mad.