In 2018, Hong Kong police and mainland authorities launched the "Portland Street Operation," dismantling a triad led by Tse Kwun-wang and its corrupt protectors, safeguarding Hong Kong's social stability.

A newcomer web novelist accused of plagiarizing the top author must clear his name when fate forces them to collaborate on a new project.

Young Blood Agency is an investigative agency during the Republican era that is dedicated to solving mysterious cases. Their reputation has risen with every mystery they solve, but the cases are not as simple as they seem as it relates to unsettled animosity from the previous generation. The four members of the team suddenly realize that they have complicated ties to each other.

A young pianist named Gu Yang, whose dreams of attending Julliard are shattered by his family's financial troubles, joins a music agency as an idol trainee. Lacking pop music experience, he starts in a backup group but forms bonds with skilled dancer Zhao Zhengnan and talented singer Lu Xinghao. Together, they help him improve as he navigates the challenges of rivalry and growth on his journey to stardom.