All components from my own stock.
It is a meeting dream. Two people meet in their dreams and ride a tandem bike together, along the river, through the tunnels, over the city, over the clouds, till the first morning light comes and they have to return to their real lives.
A mutual lucid dream is induced by the sleepers agreeing in advance what they will dream about. For example: “We’ll both dream that we are riding a tandem bike along the river”.They are aware that they are dreaming and can manipulate the events inside the dream.