The song "Honest Mistake" by Handsome Ghost tells a story of regret and longing for a lost love. The narrator reflects on a past mistake, which led to the loss of their partner. They wish they had been there when their partner needed them and are now a little older and wiser, realizing the error of their ways. The lyrics also touch upon the changes that have taken place since their breakup, as the partner has moved on and is living a new life. However, the narrator is still holding onto hope that they can be reunited, even though they acknowledge that their mistake was honest and not intentional. The overall message of the song is one of learning from past mistakes and understanding the importance of being there for the ones we love. It also speaks to the idea that sometimes it's too late to fix things, but that shouldn't stop us from trying.