The film is a coming-of-age story set in a conservative town in Ireland, where Daniel struggles to fit in due to his speech impediment and his family's reputation for being odd. His mother suffers from dementia and his father is a recluse, leading Daniel to escape into music and fantasy to cope with his isolation.
When he falls for Aisling, a rebellious girl who is new to town, Daniel is forced to confront his fear of rejection and stand up to the local bullies who torment him and his family. But when Aisling gets caught up in a love triangle with Daniel and his best friend, tensions rise and secrets are revealed that threaten to tear apart the fragile community.
As the town prepares for a big dance competition, Daniel must face his fears and muster the courage to dance in public, all while trying to save his family from being institutionalized and navigating the complexities of first love.
Through its blend of humor, heart, and music, DannyBoy explores themes of identity, acceptance, and resilience, offering a touching and quirky portrayal of life in a small town.