L.A. star architect Elliot Markham murders his major client, Millionaire Bo Williamson, who refuses, returning from two months in Europe, to approve the new town construction project his second wife Jennifer promised to finance without consulting him, making it look Bo left by airport again. Bo's first wife and still confident Goldie alerts LAPD, which sends Columbo to the apparent non-case, given the high profile. He looks into all persona, finding the scale model in Markham's office vandalized by Bo, and into the meanwhile started construction, culminating in the expensive move the have a concrete foundation pillar broken up as corpse hiding place, with a twist.
—KGF Vissers