2Tom and Clara are two struggling academics in their mid-thirties, who decide to take their first holiday in ten years. On the flight over to Indonesia, Tom experiences a debilitating panic attack, something he hasn't had in a long time, which he keeps hidden from her. At the resort, they meet Madeleine, a charismatic French woman, her Australian partner Jeremy, and their young son Ollie. The two couples strike up an easy friendship, and the holiday starts to look up - even to Tom, who is struggling to get out of his own head. But when Clara and Madeleine become trapped in the maze-like grounds of the hotel during the fogging - a routine spraying of pesticide - the dynamics suddenly shift, and the atmosphere of the holiday darkens...