A love affair through letters that we have never met, twelve letters back and forth build a utopia in the spiritual world. Until many years later, she accidentally discovered a book he published in a second-hand bookstore. The last article, "The Thirteenth Unsent Letter," exposed the cowardice deep in their hearts. It turns out that the farthest distance is not separated by mountains and seas, but standing at the door where we meet, but we all lack the courage to take that last step. This is a story about regret and silence.
Intention: the meaning of farewell