The trees are green and the summer rain is pouring. The summer homework of elementary school student Ah Quan is to observe the hatching of eggs. His family seems to be facing changes: his mother, who was absent during his growth, is released from prison and goes back to find her boyfriend who wanted her to take the blame, which makes the dispute between grandma and mother more and more intense; grandpa is diagnosed with Alzheimer's disease. Grandma's seemingly meticulous care seems to be covering up some unspeakable secret. At this time, an old friend of grandpa comes to visit. He seems to be friendly and gentle, but he stirs up a family storm...