Professor Su Jing'an is a respected academic and a man of habit. He follows his routine to the tick of the clocks in his study and nothing can stop him from having his afternoon coffee. Nothing that is, but old age. When a young academic caretaker is sent to look after Su Jing'an, he is barely the man everyone remembers. Questioning his identity, Professor Su questions all of us - who are we, and where do we belong?