Solving the Case is Slightly Bitter, My Sister is Super Sweet.

Summary

In an underground parking lot, police officer Lin Xuan confronts Gao Xin Min, a pharmaceutical company board member, about a mysterious research team incident from a decade ago. During their conversation, Lin Xuan learns that the company's chairman and secretary were involved in a significant drug development project where the entire research team died. As Lin Xuan prepares to leave, a seemingly ordinary couple enters the elevator, revealing hidden killing intent. They attempt to assassinate Lin Xuan using banned military triangular daggers, suggesting a complex conspiracy to silence those investigating the research team's suspicious death.

Full content