Police in Edinburgh receive a call from the university reporting that the family of 19-year-old international student Xiaoqiang have been unable to reach him over the past five days and are becoming increasingly worried about him. A call to Xiaoqiang's mother in China soon reveals why she is so worried, as they are a wealthy family and her son has been asking her for unusually large sums of money. In Glasgow, another woman is worried that her son may be in danger as 20-year-old Daniel has failed to return after leaving to go hiking in the mountains, and it's now nearly nightfall