It's graduation season again, and college students from a certain British university gather for a big carnival without any bottom line. During the period, they played truth or dare. The shy and introverted Felix (Tom Kane) plucked up the courage to confess to the girl he liked, Gemma (Florence Hall). As a result, he was not only rejected by the other party, but also beaten and humiliated by Gemma's boyfriend Chris (Jack Gordon). As time passed, Gemma, Chris, Paul (Liam Boyle), Elena (Jennie Jacques) and Luke (Alexander Vlahos) who attended the party that year received an invitation to go to a remote place to attend Felix's birthday party. Who was waiting for them was not Felix, but his brother, Justin (David Oakes), a soldier who had been born and died on the battlefield. Soon, they learned a shocking news, and the real purpose of this party was...