German teenager Thomas discovers that his grandfather Hans has an old 1960s sailing boat 'Susanne', named for his late grandmother but unusued for years. Hans gives the boat to Thomas, but to repair and sail it would cost a lot of money.<br /><br />Thomas and his school friends Andi and Monika meet Kathrin, another local teenager, and together they seek ways to raise money to restore the boat. They start a bicycle courier service, but this doesn't last when Thomas is distracted by an argument between his crush Kathrin and her rich boyfriend Peter, and writes off his bike in a crash.
