《流星蝴蝶剑》可以抵擋任何攻擊的武器，是一把能變換形態的月牙戟

快活林是江湖上一個神秘的殺手組織，它的主人高老大是一個水性楊花而又貪得無厭的女人，孟星魂和葉翔從小受高老大撫養，長大後都被訓練成數一數二的劍客，葉翔在一次執行任務時失敗，從此就酗酒成性，被高老大唾弃。孟星魂受命去刺殺人稱老伯的江湖盟主孫玉伯。在刺殺前，偶遇孫玉伯的女兒小蝶，二人一見傾心。
Happy forest is a mysterious killer organization in the world. Its owner, elder Gao, is a greedy woman. Meng Xinghun and ye Xiang were brought up by elder Gao from childhood. When they grew up, they were trained to be the best swordsmen. Ye Xiang failed in one mission, and then became drunk and despised by elder Gao. Meng Xinghun was ordered to assassinate sun Yubo, the leader of the alliance in the river and lake. Before the assassination, I ran into sun Yubo's daughter Xiaodie, and they fell in love at first sight.