When Tamsin Rowe returns to Redhaven Crossing after her brother Micah vanishes, she uncovers a hidden network tied to a long-abandoned research facility. Beneath the town lies decades of concealed toxic contamination, now being exploited for profit by a powerful developer. As Tamsin races to expose the truth, she must outmaneuver those determined to keep it buried—before a manufactured environmental disaster destroys the town and everyone in it.