In the over two-minute spot, the actress goes from enjoying life in paradise on a remote island (that somehow has cell service) to fighting for her life after being bitten by a great white shark. Her only allies, two fellow surfers, become instant shark bait, leaving Lively alone to fend for herself. And she's determined to make it out alive.
"I'm not dying here," she says, as a shot of her stranded on a tiny rock formation pans out.
To find out who wins the fight, you can catch "The Shallows" in theaters June 24.