An elderly couple, desperate to draw attention to the poor living conditions in their old folks home, rig the trunk of their car with fifty sticks of dynamite and a timer and plan to set it off outside City Hall. But the car is stolen by two thugs on a spree of armed liquor store robberies, unaware that the car is loaded with explosives ticking towards detonation in the trunk. Starsky and Hutch initially are on the hunt for the two robbers but when they learn that the car is rigged with dynamite, they have mere hours to track it down before disaster strikes.