Friend turns to foe,
Light fades to darkness,
but a new Fire is burning in the night.

Aska, Tjalling, Sytse, Enna, and Royce have fallen into the hands of Mayor Edison. The corrupt leader of Brandaris knows what they have done, but what he doesn't know is what motivated them. In a desperate attempt to regain power over the island, he uses the five rebels as bargaining chips to force the Skelta to reveal who is part of the Skylger resistance. Anglian girl Melinda and Skylger girl Dani team up to free their friends from prison, but their task won't be an easy one.

Meanwhile, some of the Sirens from the deep visit the indigenous Skylgers to help them to reclaim what was once theirs. And when Tesla and his assistant set sail for the island of Skylge to come to the people's aid as well, all bets are off. Edison will not give up his family's position of power without a fight, and his struggle will involve Anglians, Skylgers, and Sirens alike.

The War of Currents is about to be fought, and nothing will ever be the same again.