China's one-child policy has contributed to a rapid greying of the population. This has led to an increase in senile dementia, a condition in which memory and thinking skills decline so severely, that the ability to perform everyday activities becomes extremely difficult. Many elderly citizens have started wandering off and going missing with some disappearing altogether. Volunteer groups and the government have started taking action, in a bid to locate and reunite such seniors with their families. In this episode, we follow China's efforts to find its missing aging citizens.