Grand adventure stories often begin where you least expect, Iris knows this because she's read them all. However, as a thirteen-year-old stuck in the tiny country town of Bugden, real adventure seems a distant dream. That doesn't bother Sam, Iris' best friend. For him, catching bugs and swimming in the lake is exciting enough. But when Iris and Sam stumble upon an unusually dry river on the outskirts of town, they're led to a discovery beyond anything Iris has read about: a hidden city, lost in time and shrouded in mystery. As they explore this once flooded relic, the two unearth a forgotten tale of friendship and disaster that seems curiously familiar. Storm clouds gather as secrets begin to surface. Can Iris and Sam uncover the truth in time to keep their friendship afloat, or will history repeat and pull them apart forever?