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　　Luna, a cruise ship chambermaid, has to quit her job to attend to her sick brother. While doing so, she discovers that her mother has gone missing and her brother's condition is getting progressively worse. The siblings desperately sneak into an empty condo unit but soon discover that Penthouse 77 is not what it seems.

 从未失手的珠宝大盗，本想干完最后一票便金盆洗手，却与中年失意的精英高管意外结盟，联手布下棋局。另一边，深陷职场困局的王牌警探，正凭借蛛丝马迹一步步将矛头对准他们，更有黑帮劫匪暗中蛰伏，伺机搅局。螳螂捕蝉、黄雀在后，当规则与道德的边界被打破，这场颠覆命运的惊天罪案，究竟谁能安全脱身？

 舞台设定在崇拜水龙守护神的海底王国「海炎国」，这里因神秘污染和“强行唤醒沉睡水龙”的阴谋陷入危机。利姆露一行人原本是来海岛度假，却被卷入这场深海危机，从悠闲摸鱼被迫营业，潜入苍海深处揭开阴谋、阻止海底文明覆灭。