Bill and Gary are back for another adventure! They attempt to take Ruby from San Felipe to the beach the hard way: across 100 kilometres of the harshest desert in Mexico. Temperatures can soar to more than 40 degrees Celsius and it gets so hot, Ruby catches fire and only Gary's quick thinking can save her from a fiery death. After sleeping in hammocks strung from the largest cacti on the planet, the guys’ problems get worse the next day when Ruby's brakes fail. Although Bill has a fix, they face a dangerous night drive to make up time. Finally, the toughest challenge of all – descending a 70-metre deep canyon. They must suspend Ruby on the end of a climber’s rope to reach the beach.