Having not taken any time off for two years Sammo is told that he has to take a week off. It doesn't take him long to go stir crazy and he offers to help his neighbor, just out of hospital, by driving his cab for him. Meanwhile the rest of the MCU are involved in looking for a jewel thief and the murderer of a Marine Biologist.

A new designer drug hits the street. It is called 'Thrill' and it breaks down your inhibitions and imbues you with a euphoric sense of invincibility. Sammo and Tyrell have to deal with a gang of 'Thrill junkies' when a traffic jam they are in is attacked. They stop the gang but Sammo's leg is broken in the process. He ends up in the same hospital as Ludlow Teale, the government's chief negotiator for the Middle East. Kyle Strode returns to town and Grace continues trying to get inside his organization so that she can find Lone Wei. The MCU investigations reveal that Scorpio has something to do with 'Thrill' and they plan a major operation to show it's potential.