Kaz and his crew are busy preparing for Lu's & Lily's wedding when they acquire a rare prototype 1954 Hudson V-8 Coupe' to restore in their new shop in San Rafael. Upon purchase they learn that the only four ever built are resting in the hull of a sunken freighter off the coast of Mexico. The strange part is they were sealed in a special container as part of a scientific experiment back in 1954 and may still be in perfect condition some 60 years later. Travel to the bottom of the Pacific Ocean with the crew as they attempt to rescue these rare and valuable antique automobiles in this, their seventh adventure.