The Siren's BrideEpisode 16

Marine researcher Leah discovers that the mysterious sea creature she once saved as a child is actually a powerful Siren feared by all. Years later, he takes her into the deep sea, believing she is his destined mate. When Leah finally remembers the promise she made long ago, she realizes she is the only person who can heal the lonely monster’s wounded heart—or become the one thing he will never let go.