It's revealed - through non-linear narrative - that after arguing in their car, the couple suffered a rollover accident off a cliff in a remote area, pinning both passengers upside-down in the vehicle.
Distraught from her injuries and unable to make communication with an unresponsive Scotty, Nicole fails to finish dialing "911" on her mobile phone due to a cracked touchscreen.
At first, the man appears engaged and sympathetic to Nicole's situation but quickly takes amusement in her crisis and the health risks of ischaemia from cut-off blood circulation.
Nicole does not catch on to Casey's torment until it is clear that he has no interest in tracing her call for a rescue team; he has discovered her celebrity status by searching her name on Wikipedia, and decides to use it to his own abusive advantage.
The conversation between them quickly devolves into a psychological battle of wits, all whilst Nicole wards off a wolf and tries to remain calm when a rattlesnake slithers into her car, circling her neck and Scotty's before she kills it with a shard of glass.