A Hong Kong man with a disability hires a Filipino migrant worker to care for him. As they spend more time together through different seasons, they start learning about themselves.

For his project under the lauded First Feature Film Initiative programme, director Ka Sing-fung tells the heartrending journey of a woman whose life is forever changed by the children she takes in as a temporary foster carer. In a career-best performance, Sammi Cheng stars as Mei, a woman trying to get over the death of her young son through the children she welcomes into her home. Each ward offers Mei a different challenge and a newfound appreciation for the difficulties of motherhood, but when her dedication to the job causes her marriage to turn sour, Mei is forced to make a choice.

When a human head is discovered, the paths of a female student, a cellist, an autistic teenager, a police officer, a prostitute, a teacher and a dog are found to be serendipitously entwined. Who caused the death? What is the motive? Where is the body? Attempts to answer these questions lead to keywords starting with the letter "G". As the case is peeled back layer by layer, the complexity and desperation of the people living in Hong Kong today are slowly uncovered, and a suspenseful multifarious Hong Kong story is revealed.