Spunky Mellie Wheaton, recovering from a case of terminally bad judgment when it comes to men, is determined to concentrate on her new job in Hawaii as a marine biologist. That is, until her fishing line tangles with handsome hunk TJ, lead singer in the boy band TJ and the Sharks at her brother's wedding. Dismissing him as simply another hot surfer dude who sings, she sees he has his sights set on her.

TJ is more than meets the eye. He's an up and coming expert in oceanic ecology and heads a prestigious research study Mellie joins. While serious about sharks─ especially tiger sharks─ he finds himself nibbling a fish here and there but has yet to land the catch of his dreams. Soon he's entangled in Mellie's line and becomes hooked by her charms, but Mellie isn't that easily captured.

Time spent together on the ocean conducting research under the balmy trade winds and hot Hawaiian sunshine lures them toward love until Wolfe, her ex, follows her to Oahu determined to capture and land her heart once and for all. It's all up to Mellie. Can she survive her tsunami of feelings? Keep her independence? Or will one of the men become her catch of the day?