The first full trailer for British horror film In Fear has debuted and, quite frankly, we're a bit terrified. You can watch it in the picture gallery below.

The film stars Alice Englert (Ginger and Rosa) and Iain De Caestecker as a young couple who get lost in the countryside on the way to a music festival. While trying to navigate their way around twisty, unlit country roads, they find themselves pursued by a sinister presence.

It's a scenario that's sure to hit home with anyone who's ever found themselves lost in an unfamiliar environment, and as much of the action takes place inside the couple's car, we imagine there's a healthy dose of claustrophobia involved too.

In Fear is the feature film debut by writer/director Jeremy Lovering, who reportedly withheld the script from Englert and De Caestecker so the leads would be just as clueless as the audience about what would happen next. Based on the praise Lovering has received following the film's premiere at the Sundance film festival, we reckon we'll be hearing a lot more from him in the future.

In Fear is released on Fri 15 Nov.