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。
Four college students venture to a storied haunted house over night. The goal is simple, obtain research for a paper they are writing on urban myths and legends. A caretaker, played by Richard Grieco, greets them and offers to share the tale of the home's tragic beginnings. As events unfold, the group starts to understand there's more to the stories than they first believed. Friendships and motives are questioned. The gentle caretaker's role is brought into questions. When tragedy strikes, they finally understand that Sanctus House is more than myth.
