The plot of the Ben 10: Alien Swarm follows Ben as he makes the hard and rather controversial decision to break ranks with his fellow Plumber allies to help a friend in need. A mysterious girl named Elena, who is also Ben’s a childhood friend, hinted that there will be an oncoming alien threat to the Earth. Because of it, Ben Tennyson, along with Gwen and Kevin, lend their super powered instincts to help Elena in her mission to find her missing father, Validus.

Our fearless band of young heroes stumbles upon a hive of alien “nanobots” using humans as host bodies in order to take over the world. The nanobots, or “alien swarm” are controlled by a single mind.
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