1950s British crime thriller set in London. Young Danny Willard (David Hemmings) and his grandfather (James Hayter) become involved in exposing a smuggling ring after they befriend West Indian immigrant Victor Conway (Earl Cameron). Victor has been accused of murdering a local criminal and because of the colour of his skin he is considered guilty from the off. However, with the help of Danny, who witnessed what really happened, they set about attempting to expose the true culprits.