Marina steps forward to spare her kingdom from an ancient sacrificial curse, taking her half-sister Serena's place in the ocean depths. Rescued by Poseidon, the two share a passionate night before Serena steals the divine token and claims to be the Sea God's fated savior. Cast out into a remote fishing hamlet, Marina gives birth to six children blessed with divine elemental powers.
When her youngest son falls critically ill with an incomplete bloodline, Marina journeys to the Sea God's Medical Palace to secure a healing pearl, crossing paths with Poseidon once again. As lethal sea monsters strike and Serena's fraud unravels, Poseidon discovers Marina is his true beloved. Uniting with her gifted children, Marina ascends the coral throne as the true Sea Queen.
