Set in the 24th century of the Star Trek science fiction universe, the series follows a Federation spaceship on its way home after being flung to the other side of the Galaxy.
An enemy uses a high-energy transporter beam to steal items of technological value from Voyager, including their computer core and the Doctor's mobile holo-emitter.
Back on Voyager, Chakotay interrogates one of the traders and learns that a man named Tau sells weapons and technology he confiscates from passing ships.
Armed with Leonardo's accurate topographic maps of the region, Tuvok and Seven of Nine locate the storage facility where the processor is kept, but a dispersion field around it makes transport impossible.
Once they find the processor, Janeway successfully executes Tuvok's plan, but the arrival of an armed guard prevents the pair from beaming up with the computer.