清朝末年的香港，在上、中、西环有“镇三环”之称的帮办暗中勾结西环恶霸勾心虎，西环治安一时乌烟瘴气。警官马如龙（成龙）奉命接管西环后，迅速将勾心虎拘捕人狱，招来“镇三环”的怨恨。彼时内地革命风云翻涌，革命党人来港宣传，并计划营救被捕同志。为将革命党人一网打尽，清廷派遣密使联络镇三环，马如龙结识白影红、莹莹、珊珊等革命党人（张曼玉、关之琳、刘嘉玲等）后也被卷入斗争漩涡，而同时，一群四肢发达头脑简单的海盗正在伺机向马如龙报仇。©豆瓣

Disc Title: Project_A_2_1987_UHD
Disc Size: 86,306,702,028 bytes
Protection: AACS2
Playlist: 00100.MPLS 
Size: 81,096,996,864 bytes
Length: 1:46:36.181
Total Bitrate: 101.43 Mbps
Video: MPEG-H HEVC Video / 87121 kbps / 2160p / 23.976 fps / 16:9 / Main 10 @ Level 5.1 @ High / 4:2:0 / 10 bits / 1000nits / HDR10 / BT.2020
Video: * MPEG-H HEVC Video / 66 kbps / 1080p / 23.976 fps / 16:9 / Main 10 @ Level 5.1 @ High / 4:2:0 / 10 bits / 1000nits / Dolby Vision FEL / BT.2020
Audio: Chinese / DTS-HD Master Audio / 2.0 / 48 kHz / 914 kbps / 16-bit (DTS Core: 2.0 / 48 kHz / 768 kbps / 16-bit)
Audio: Chinese / DTS-HD Master Audio / 2.0 / 48 kHz / 968 kbps / 16-bit (DTS Core: 2.0 / 48 kHz / 768 kbps / 16-bit)
Audio: Chinese / DTS-HD Master Audio / 2.0 / 48 kHz / 969 kbps / 16-bit (DTS Core: 2.0 / 48 kHz / 768 kbps / 16-bit)
Audio: Chinese / DTS-HD Master Audio / 2.0 / 48 kHz / 973 kbps / 16-bit (DTS Core: 2.0 / 48 kHz / 768 kbps / 16-bit)
Audio: English / DTS Audio / 2.0 / 48 kHz / 256 kbps / 16-bit
Audio: Chinese / Dolby TrueHD/Atmos Audio / 7.1+15 objects / 48 kHz / 2847 kbps / 16-bit (AC3 Core: 5.1-EX / 48 kHz / 384 kbps)
* Audio: English / DTS-HD Master Audio / 2.0 / 48 kHz / 936 kbps / 16-bit (DTS Core: 2.0 / 48 kHz / 768 kbps / 16-bit)
Subtitle: English / 43.547 kbps 
Subtitle: English / 43.595 kbps