After reading a story about the bogeyman, SpongeBob becomes scared of the dark, buying night lights in bulk. Patrick admits he is scared of the dark too. Mermaid Man and Barnacle Boy come to the pineapple and say that there is nothing to be afraid of, after he flashes the Mermaid Man signal. But an enemy of Mermaid Man, known as The Moth, arrives. Mermaid Man has been pursuing him for more than 57 years, and attempts to defeat him. However, Mermaid Man and Barnacle Boy are defeated. SpongeBob attempts to trap The Moth in a lighthouse (that, along with other objects, SpongeBob and Patrick placed onto SpoongeBob's house in order to illuminate it). However, The Moth, who has flight and super strength abilities, flies away, taking the lighthouse and most of SpongeBob's house with him. Once the sun comes up, SpongeBob gets over his fear of the dark.