Hayley’s a smart, charming teenage girl. Jeff’s a handsome, smooth fashion photographer. An Internet chat, a coffee shop meet-up, an impromptu fashion shoot back at Jeff’s place. Jeff thinks it’s his lucky night. He’s in for a surprise.

When Ann, husband George, and son Georgie arrive at their holiday home they are visited by a pair of polite and seemingly pleasant young men. Armed with deceptively sweet smiles and some golf clubs, they proceed to terrorize and torture the tight-knit clan, giving them until the next day to survive.

Three teenagers are confined to an isolated country estate that could very well be on another planet. The trio spend their days listening to endless homemade tapes that teach them a whole new vocabulary. Any word that comes from beyond their family abode is instantly assigned a new meaning. Hence 'the sea' refers to a large armchair an...