Alison (Melissa George – Triangle) and a group of her friends take a mountaineering break in rural Scotland. Whilst on a hike through some dense forest, they find a pipe protruding from the ground with a small girls voices screaming out for help. They dig around and discover that the young girl has been buried there alive. She doesn’t speak English but has clearly been trapped for days. Alison decides to take her and runs for help just as the men who put her underground return. Alison and co. begin to race for their lives through harsh terrain and mountainous ranges to try and seek help before it’s too late.