Long ago before Aquaman and Mera met each other, the princess of Xebel was sent by Orm to assasinate Arthur Curry but then after she accidentally murdered Arthur's biological father Thomas, she redeem herself discovering that Arthur's life was not to take away because he was an innocent one as also it was his father, then after a time she felt in love with each other and decided to become king and queen of Atlantis after they dethroned Orm years ago, but now Hila aka Siren a Xebelian Assasin and twin sister of Mera joins with Black Manta to finish the job of killing Aquaman and take over not just Atlantis but the entire planet, Aquaman and Mera must stop the 2 terrorists which will also cost their marriage when Aquaman discovers that Mera was the masked assasin who tried to kill him and who killed his father.
