With her marriage on the rocks, Hsiao-yu decides to take up a colleague's suggestion to try Stable, an AI assistant.

Ta-kai's book proposal is rejected, but his agent has a different proposition. Hsiao-yu tries to repair their relationship through Stable.

Hsiao-yu and Ta-kai discover unwelcome secrets about each other. Meanwhile, Hsiao-yu’s younger sister comes and stay with them.

Ta-kai struggles to publish his new book, while Hsiao-yu leaves and goes on a business trip to Vietnam.

Ta-kai receives some good news and decides to celebrate, leading Hsiao-yu to discover a heartbreaking truth.

Ta-kai tries to make up for his mistake with Stable's help, only to learn about the other life Hsiao-yu is living in Vietnam.