Nex MacMillan is a man of simple pleasures. While his father Colin has been chasing Mr. Millstone around the world in boats, Nex and his brother Mick continue their daily lives in the township of Goleta. Their mother, Marilyn, has left the family home to travel the world in trains until she finds herself, or her husband, whichever comes first. She's all but forgotten about the key and the bookmark, both made of an otherworldly substance. But Nex hasn't forgotten. He has held onto the bookmark, while Colin holds the key. The moment has come for the special objects to fulfill their purpose.