In the novel, Private Investigator Philip Marlowe encounters seemingly straightforward cases involving blackmail, murder, and power dynamics. However, as Marlowe delves deeper, he discovers a labyrinth of deceit, morally gray characters, and conflicting motives. The title "The Big Sleep" symbolically represents this hidden web of complications that lie beneath the surface of the seemingly simple events.
The enigmatic title hints at the idea that the apparent ease of solving the cases turns into a prolonged, convoluted "big sleep" for the protagonist as he becomes entangled in a perilous world of crime, danger, and moral dilemmas. The "sleep" can also be interpreted metaphorically as a state of oblivion or unawareness, reflecting the way characters get drawn into webs of deception without realizing the full extent of the darkness that surrounds them.
Throughout the novel, Chandler masterfully weaves together various plot threads and characters, revealing the complexities and contradictions of the seemingly tranquil and idyllic setting of Los Angeles. The title "The Big Sleep" underscores the underlying atmosphere of mystery and alludes to the fact that there are deeper forces at play beyond the obvious crimes.