When Colin discovers his son is on a murder charge in France, he trails his small boat, 'The Dragonfly', across the Channel to help. There he meets his grand-daughter - the irrepressible Delphine - for the first time. They embark on a boat journey through the picturesque French canals, heading south through Burgundy, 'until the butter melts'. Along the way, they catch up with Tyler, a spirited American, and land big fish, cultivate new loves and uncover a burning secret. But can Colin help his son get off the hook?