"Frank and Joe are soaking up some sun in Bermuda and doing a little sleuthing on the side. Their father wants them to check out a shady character named Bernhard Kruger, the suspected kingpin of a big credit card scam. But the brothers aren't making any headway--so far Kruger is clean.
When the Hardy's spy on Kruger's villa, one of his thugs spots them. Before they know it, they're being tailed by a black sedan and run off the road into the ocean! Their vacation shot, Frank and Joe resolve to nail Kruger. But he's on to them, and he has other plans--like arranging for the brothers to vanish in the Bermuda Triangle."