When the Pickford siblings arrive at The Grand Hotel, a nostalgic tourist paradise, they have every intention of spending the long weekend making nice. Pete, the nation’s foremost expert on gastropods (mollusks), is keen to wade around the lake in search of a rare and exciting Carthusian snail. Viv, reeling from the secret revelation that her husband is gay, is determined to put on a brave face for her daughter. And Corey, a charming, handsome grifter, has lucked into five pounds of cocaine he plans to sell to the first dumb rich guy he can find. But when Pete falls for the alluring mother of a local kid, when Viv’s daughter gets up to teenage trouble, and when Corey finds the wealthy guests less interested in party drugs than golf clubs and waffle cones, the long weekend of family bonding veers into disaster.