Four new officers, selected for their expertise in special fields, are assigned to handle major cases left unsolved by various police departments.
Opening show involves an attempt by the fiveman "Chase" unit to bust a rolling gambling casino set up in a tractor-trailer rig whose sides are cleverly marked "A-1 Produce Co."
Big winners at the track find robbers waiting for them at their homes, so Chase (Mitchell Ryan) and his men pose as big bettors and winners to flush out the gang and its tip-off operation.
Members of the Chase unit pose as rogue cops. The special police unit tries to catch the top man in a cocaine operation.