A ship sinks due to pirates and Kurt interviews. But this was no ordinary pirates since they sink the whole ship in such a short period. Normally they take the goods and run, but instead these methodically sink the ship as fast a possible. Then Kurt and Joe are in the middle of a underwater race when some sort of disturbance threatens to crash them into a large tower of rock, making a new discovery in the process. Yet, someone is watching Kurt's every move waiting for the right moment to strike. Someone Kurt has had previous dealings with long ago.

As usual the humor between Joe and Kurt is wonderful as is the other character interactions. I didn't like this particular story-line as much as other books I have read in the NUMA series. The ending felt too short. I can't put my finger on it, but it felt like something was missing. Regardless, I still enjoyed the book and it is a worthy addition to the "NUMA Files".