A true story
Of course, that's impossible.
There's no such thing as a true story. As soon as you start telling a story, making it relevant and interesting to me, hooking it into my worldviews and generating emotions and memories, it ceases to be true, at least if we define true as the whole truth, every possible fact, non-localized and regardless of culture.
Since you're going to tell a story, you might as well get good at it, focus on it and tell it in a way that you're proud of.