In a nutshell: pharmaceutical company creates GM snakes because their venom has been found to cure cancer but the ordinary snakes aren't producing the stuff quickly enough. The snakes escape (admittedly I don't know how as I was making cuppasoup) and terrorise a nearby island called Eden Cove - cue plenty of eye-rolling.
Eden Cove is idyllic till the killer vipers arrive: their first victims had been enjoying their honeymoon and reluctant to return home and "leave that view." They were eaten alive in their tent while doing what newlyweds do....
Then the man who left his wife for his secretary finds the secretary eaten alive in their bed after she thinks the snake crawling up her leg is her lover's caresses! I began to wonder if there was some kind of trend developing because the ex-wife of said lover is, along with her own new lover, next on the menu. I half-expected there to be characters called Eve, Adam and God, but apparently the filmmakers didn't want to be too biblical.
Having said that, one of the surviving main characters did own a garden centre. By the end she had fallen in love with the island's saviour, a former US army marine and doctor to boot; big surprise.
Needless to say, it wasn't all that good a film, though if you just want a little background noise for whatever reason, I reckon it would do the job well.