After her debt-ridden husband Tim has killed himself, Mary Reynolds asks Eddie's help in discovering why her credit facilities have been stopped when the debt concerned was twelve years earlier and apparently cancelled. Eddie discovers that Tim was working on a computer which diagnosed faults in cars and that the debt collection firm harassing Mary is linked to a large computer company anxious to bankrupt small firms like the Reynolds'. By leaning on a former colleague who has joined the debt collectors through fraudulent means Eddie is able to help Mary but not, apparently, his own credit rating.