Soon to retire Detective Inspector Mavor becomes embroiled in a case involving a series of murders, carried out by the unknown "Easterman". On investigating he discovers that Easterman was the homosexual lover of a man he killed some time before and now he is out for revenge.
Working on a computer project Martha Fredricks finds herself impeded by one of her colleagues Mark Hawkins. Hawkins is in secret communication with the computer, taking money from the bank to invest in the stock market. Collecting the interest and replacing the original money, he goes unnoticed, until Fredricks discovers his scheme.
Matthew Ward, a boy whose parents are on the verge of divorcing, discovers a 16th-century book of spells. With this he attempts to bring about events to his own wishes. However his plans go wrong when his mother brings home her lover who then murders his father.
Seemingly estranged father and son Sir Wilfred and Toby are at loggerheads over the latter's inheritance. Toby's fiancé Karen steps in and beguiles Wilfred due to her similarity to his deceased wife. It is later revealed that Wilfred and Toby have been enacting a ruse, but Karen is still one step ahead.
Sir Robert Haines is in the process of making secret deals with an ex-Arab Prime Minister. Meanwhile at home, his mistress Jean has hatched a plan to avenge his philandering. However, both of them later come unstuck when terrorist enemies of the Arab come calling.
Lieutenant James White enrols in a training course which will build his resistance to interrogation. As he proceeds however he discovers that the training is more intense than expected, and people on the outside world cannot be trusted.
