A gripping British thriller unfolds in Tank Malling, a 1989 film that probes the darkest corners of London's underbelly. When investigative reporter and jailbird John 'Tank' Malling is framed on scant evidence supplied by the city's mob, he finds an unlikely ally in sensuous call-girl Helen Searle - but their quest for retribution unleashes a deadly game of cat and mouse with ruthless figures Sir Robert Knight and his lawyer Dunboyne.