Four friends are exposed to a strange gas that gives them the powers of earth,
air, fire and water, and take on new identities as superheroes. Zaf becomes
Zephyr, who can fly and direct the wind. Tara becomes Terra, who can make the
earth shake and plants grow. Ian becomes Inferno, with the power to create
fire. April becomes Aqua, her body turning to water as she creates waves,
floods and waterspouts.

The superhero team take a break from being eco-warriors to visit Bangladesh,
but find themselves in the middle of a tiger-poaching ring. The second exciting
adventure of Factor 4.