Always scan files from unofficial sources with antivirus software. Large video files are sometimes used to mask bloatware or scripts, though standard MKVs are generally safe.
The White Storm is a high-octane crime franchise centered around the Triads, undercover police work, and the international drug trade. If your file is labeled "09," it is almost certainly an episode from the or a segmented part of the film series.
Since MKVs can be complex, ensure you are using a versatile media player like VLC or IINA to ensure the audio and subtitles sync correctly.
The series typically follows three lifelong friends who work in the narcotics bureau. Their loyalty is tested as they infiltrate dangerous cartels, leading to themes of betrayal, sacrifice, and "brotherhood" (a staple of Hong Kong cinema).