Dovidl Rappoport is a violin prodigy and a Polish refugee whose family perished in the Holocaust. He now lives with a wealthy Jewish family in London and befriends their socially awkward son, Martin Simmonds. Martin´s father, a musical impresario, trains Dovidl for the biggest debut on the London stage, and Martin is commandeered to act as caretaker. The two become close friends, forming a sybaritic relationship. Dovidl, however, slowly begins to slink into London´s seamier nightlife and eventually disappears on the day of his much-anticipated debut, wreaking havoc on the family and its business. Forty years later, Martin discovers a trace of the vanished prodigy and eventually ekes out a plan to avenge the betrayal all those years ago.