With her customary skill, Margaret Yorke weaves an enthralling web of suspense and tension out of seemingly ordinary and unrelated events. Denis is living on the edge of society: neglected and unwanted, he scrapes by on his earnings as an odd-jobber. His is the sort of desperation that will tip into lawlessness at the drop of a monkey-wrench. A chance encounter with Len, inmate of the local open prison, enables Densi to prove himself as the accessory to a cunningly contrived crime which ends in murder and has Denis running for his life.