Captain Dunmoore and the crew of the Q-Ship Iolanthe intercept a distress signal. An abandoned cargo ship, which turns out to house a single survivor. What follows is a chase to find the perpetrators and disentangle their complex scheme.
While Dunmoore and her merry band of naval personnel are still good fun to hang out with, the quality of the narrative is lower than in previous installments. There seems to be no real risk that any of the characters will be killed or even seriously injured. Much of the text consists of the main characters spouting literary and military history quotes in extended banters sessions, showing off how clever they are while their enemies are continually confounded.