It grew stiff after their car broke down on a distant dusty bush 300 miles northwest of Alice Springs, two teenagers, their three-year-old son and a 12-year-old boy needed only someone to go past and help.
Unfortunately, this help never arrived.
Without a cell phone service, they left the car and set off towards the distant community, 18 km from the place where the vehicle was found.
Now all four are dead.
In one of the worst tragedies in Outback, the quartet left Willowra on Friday for the community of Jarra Jarr.
The trip is about 114 km or a five-hour drive from Jarra Jarra Access Rd.
The pair's car broke down roughly halfway.
Weather records show that the temperature in the area has reached 39.9 ° C on Friday, 41 ° C on Saturday and 40.3 ° C on Sunday.
FIND OUT MORE: TRAGEDIA AS A BODY OF A BOY IS LOCATED NEARBY FAMILY IN THE DISCOVERY
On Wednesday, the passersby of a 19-year-old couple and their son passed by.
It turns out that they will be found 4.5km from their abandoned car, where leftovers of food and water were found.
A "distraught" passer-by rushed to Willowry's health clinic to raise the alarm.
On Wednesday evening, family members informed the police that a 12-year-old boy from the same community. He also traveled with his young family, causing desperate aerial and ground searches for the missing passenger.
Tragically, less than 24 hours later, the NT police confirmed that the boy's body was found just 120 meters from the lost family.
The police still have to rule out the possibility that the car will be even more uninterested in passengers.
"Although the police have no information suggesting that other passengers were in the car, we will continue the preventive land and air search until we are sure that all areas of interest have been sufficiently absorbed," said Jody Nobbs, director of the New Desert District.
Supt Nobbs said that the man who initially raised the alarm at the Willowra Health Clinic would be a critical part of the police investigation.
He said the tragic incident was a sad reminder of taking precautions while traveling on the distant roads of the Northern Territory.
"This, unfortunately, serves as a reminder for anyone who travels on the NT roads to make sure that the vehicle is in good condition during the trip, that you have enough supplies, including water and a first aid kit, and that someone is aware of what it's your travel route – when you're going to leave, come and plan your route, "he said.