There is always a quiet place in the noisy city, and there is always a low-key presence among the lively crowds. That person in that place is like a private space in the network of music, energetic yet inaccessible.
Erhua is a person who likes quietness, is afraid of loneliness, likes to travel with a backpack, worries about the malice of strangers, and dreams of an omnipotent future. She is an ordinary and unique person.
Canghai is a person who is worried about troubles and doesn't want to be idle. He has made many once-and-for-all life plans, but they were all rejected by reason. He is content with the status quo but is afraid of standing still. He is a unique and ordinary person.
Turning points occur in the expected future and at unexpected moments. There are full of uncertainties among people, some can be predicted, and some are just between probabilities.
This is how two people meet.