Makepeace poses as reporter Debby Smith to get close to hoodlum 'Marocco' Jack and ends up saving his life from a rival gang. Dempsey joins Marocco's gang by posing as an American driver called Andy Sallapuccio, whom they need to pull off two simultaneous jewel heists. Meanwhile Spikings is facing complaints from upstairs that might lead to SI 10 being shut down.

Dempsey goes undercover and infiltrates a gang after discovering a link between the London underworld and the New York police department.

While working undercover, Dempsey comes across a former nemesis from New York City.