When a frenzy of five Megalodons torment the open ocean, the stakes have never been higher.

In this "half-fish" out-of-water animated adventure, a mermaid princess makes a bargain with a sea witch to become human.

When Renee's shy teenage daughter Deandra finally makes a friend, Olivia, she is thrilled. After Olivia's initial bossiness turns into emotional abuse, Renee forbids the relationship from continuing, prompting the girls to run away together. Renee embarks on a desperate search for her daughter, before she's gone for good.

As an epidemic of a lethal airborne virus - that kills within days - rapidly grows, the worldwide medical community races to find a cure and control the panic that spreads faster than the virus itself.