|This needs a stretch.|
The Mystery Club Convention is a gathering for mystery solvers, in or near Gotham City.
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Mystery Inc. were heading to the convention in the Mystery Machine, when they hit a bump in the road, disconnecting the battery. The sudden emmergence of a plane landing into an empty field close by, near a farmhouse, piqued the attention of the sleuths, and the mystery club convention was forgotten.
- It's unknown if they got to the convention, as it's not brought up again.