Set in a sprawling 1920s metropolis, 'Echoes of the Oddity' follows a disgraced detective who stumbles upon a cryptic message tied to a forgotten scientific experiment—an attempt to harness the Riemann Hypothesis. As the detective investigates a series of surreal occurrences and unexplainable phenomena, they must interact with an array of eccentric characters while solving riddles and deciphering clues that bend the very fabric of reality. Each choice leads the player deeper into a web of conspiracies, as they attempt to unveil a sinister organization aiming to unleash chaotic power from beyond the number line before time runs out.