A helpless noisy phone call led to an unexpected crash, which led to a storm with hidden mobile phones. When yuppie Phillip and his fiancee were quarrelling on the phone, they unwittingly knocked down a boy. In a panic, he walked away and kept track of the boy's whereabouts. At this time, the boy's single mother also secretly tracked down the victim. Kristen Pei Zhou is adept at showing his inner feelings in a sequence of rich times, using clear handling techniques, focusing on precision and elegance, which makes this film a beautiful prose that slowly burns on guilt and sorrow.