IU officially bids farewell to her 20s and welcomes her 30s with her documentary "Pieces: 29th Winter". The artist gathers pieces of memories and remarkable moments from her 13-year journey as a singer-songwriter. Through past undisclosed clips and IU’s most honest thoughts that were not publicized on purpose, and the stories of those who have seen IU up close, we meet her twenties and the pieces in between.