An Ni (played by Dilireba), a top student from a prestigious law school, was assigned to the mysterious Fourth Procuratorate after joining the procuratorate. Faced with many thorny new cybercrime cases, she and her fellow prosecutors accurately locked on to the criminal clues and actively exerted their prosecutorial wisdom. With the full cooperation of criminal police captain He Luyuan (played by Tong Dawei), they tracked across borders, went through hardships, and found the truth, and finally arrested the hidden criminal suspects one by one. Prosecutor An Ni even used wonderful court prosecutions to make the criminal suspects plead guilty, showing the professional style of female prosecutors in the new era.