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Holly always assumed that getting superpowers would be the hard part of becoming a superhero.

But when a transformer explodes overhead on her way home from work one day, she's forced to reconsider—getting them was easy. After she's released from the hospital, she discovers she can control electricity.

While Holly is practicing her newfound ability in the backyard, her younger brother Jesse sees her and decides to use his training in martial arts to teach his sister how to rein in her power.

It...