The work alludes to the use of the word “wave” in German media, such as “migrant tsunami” and “migrant wave”, used to intimidate the public. The film suggests the flow of migration as a natural part of human existence by comparing it to the movement and circulation of waves that have always been everywhere.

Kuronuma Sawako is completely misunderstood by her classmates. Her timid and sweet demeanor is often mistaken for malicious behavior. This is due to her resemblance to the ghost girl from "The Ring", which has led her peers to give her the nickname Sadako.

A failed writer given to plagiarism gets a buzz at the door from a bright young working girl with a highly original approach to life and sex and his life and work is totally thrown off balance.

Youngwu and Jiyoung have been married for ten years and have long since grown apart. He, a publisher, is having an affair with a writer and she, a housewife, feels drawn to a gentle young Muslim she meets named Kerim. When he is obliged to leave the country she decides to follow him to Varanasi. Leaving her husband a note saying that she is away visiting relatives, she spends her time wandering along the banks of the Ganges and down the busy streets of this Hindu city in search of Kerim. When he turns on the television her husband is astonished to see his wife covered in ashes, emerging from a restaurant that has been bombed by terrorists. Youngwo decides to head for India to find his wife and obtain an explanation for her behaviour.