Two seemingly unrelated incidents concerning two teenagers occurred in May 1965 in the Hampshire town of Springford. A body of an eighteen year old boy was found in the river, a few weeks later an eighteen year old girl disappeared. The death of the boy was recorded as a suicide, the disappearance of the girl was left as a missing person's case, one of the longest missing person's case in Britain. After a 45 year absence Bob Saunders and Joe Cummings are reunited in Springford. They were best friends back in 1965, but things are different now. Bob has a secret that he wants to reveal to Joe, but he wants to tell Joe at the right time. Meanwhile Joe reveals that he always been a practising homosexual, even when it was illegal. It turns out that the suicide of the boy was in fact a murder and the disappearance of the girl may have been related. New evidence, kept hidden by Bob and Joe's old Physics teacher, who has a dark secret, leads the police to reinvestigate both cases with unexpected results.