A young American woman goes surfing alone at a secluded beach in Mexico but finds herself stranded on a rock with a hungry great white shark circling. And a seagull called Steve for company! This makes a great change from the glut of ridiculous shark movies "inspired" by the likes of 'Sharknado". No roaring shark (I didn't hear any anyway) and no CGI that looks like they were done by a 5 year old. Sure, there are goofs and gaffs, and I felt that the final showdown was pretty silly. However it is nicely filmed, has decent effects, plenty of tension and Blake Lively does a good job as the heroine. She also looks mighty fine in a bikini!