In a mountain range in Southeast Asia, Eddy Houseman, co-founder of the construction company Gray & Houseman, is working with his team to build a path through the mountains. With explosives they make a gap between two mountains, where soon a new road will be constructed. When Eddy and his assistants Cheng and Taylor take a look, a rockslide forces them to make a quick return.Meanwhile, a bit further, the main engine of the company lays the tarmac road to the piece that has already been cleared by Eddy and his team. Eddy is congratulated by his partner Bob Gray, who is convinced that the road will be cleared on time. Speedy action is required because the rainy season soon begins. Eddy has done his part and decides to even take a vacation, planning to visit his old girlfriend, Tin-Tin.