Andy's been thinking about internet dating. Not for him, but for his friend Lance who's still not over the departure of his ex-wife. A mysterious stranger arrives to tempt the Danebury Metal Detecting Club in more ways than one.

Andy spots something suspicious and Sophie's cracking on with her new friend at the library. The club is visited by the local mayor on a matter of some delicacy, and some old enemies seem unusually interested in Peter's quest to find his grandfather.

Russell and Hugh embark on their mission to recover the mayor's chain of office from the car park in Barnfather Woods, while Sophie proves she's still very bad at spying. Both Becky and Lance have something important to tell Andy.

Andy suddenly has a job interview to go to, while Lance has a lot of catching up to do. The mystery of the buried bomber is the least of their problems, but a disturbing possibility emerges from an unlikely source that throws everything into doubt.

Finally, it is the day of the DMDC's annual rally and Terry is expecting a really big turn-out. But for Andy and Lance, will the day bring heartbreak or triumph?