Mexico, 1935. Harrison Shepherd is working in the household of famed muralist Diego Rivera and his wife Frida Kahlo. Sometimes cook, sometimes secretary, Shepherd is always an observer, recording his experiences in diaries and notebooks. When exiled Bolshevik leader Lev Trotsky arrives, Shepherd inadvertently casts in his lot with art and revolution and his aim for an invisible life is thwarted forever.

The Lacuna is a gripping story of identity, the connection with our past and the power of words to create or devastate.