**Chapter 1: The Call of Ahtohallan**

Queen Iduna stood at the bow of the ship, her brown hair whipping about her face as the wind howled and the waves crashed against the hull. She gazed out at the horizon, her eyes fixed on the distant mist that shrouded the mystical river Ahtohallan. For years, she had sought answers about her daughters' powers, and the ancient river was said to hold the secrets she needed. As the storm intensified, Iduna's thoughts turned to her daughters, Elsa and Anna, back in Arendelle. She had left them in the capable hands of Grand Pabbie, but she couldn't shake the feeling that she was neglecting her duties as a mother. The sea, however, had called to her, and she had felt an inexplicable pull to embark on this journey. The ship creaked and groaned as it rode the waves, and Iduna's stomach lurched with each dip and rise. She clung to the rail, her knuckles white with tension, as the storm raged on. The captain's voice was lost in the wind, but she saw him shouting orders to his crew. Suddenly, a massive wave crashed over the bow, sweeping Iduna off her feet. She tumbled across the deck, her head spinning, and landed hard on the wooden planks. As she struggled to sit up, she saw the ship's mast splintering, the sail tearing free. "Agnarr, no!" she screamed, but her voice was lost in the tempest. The ship shuddered, and Iduna felt herself being thrown into the sea. She plunged beneath the surface, the icy water closing over her head like a shroud. She kicked and struggled, desperate to escape the crushing pressure. When she finally broke free, gasping for air, she saw the wreckage of the ship drifting away, the mast snapping like a twig. The storm still raged, but she spotted a dark shape looming in the distance – the rocky shore of an unknown land. With a surge of adrenaline, Iduna kicked and stroked through the waves, her body aching from the battering she had taken. She reached the shore, exhausted, and collapsed onto the wet sand. As the storm slowly began to subside, she lay there, her eyes drifting shut, and let the darkness claim her. When she came to, she was in a strange, warm bed, surrounded by unfamiliar faces. A gentle voice spoke to her, and she opened her eyes to find a kindly old woman smiling at her. "Welcome, Your Majesty," the woman said. "You've been washed up on our shores, injured and half-drowned. We've brought you to our king's castle, where you can recover in safety." Iduna's mind was foggy, but she recalled her journey and the shipwreck. She tried to sit up, but a wave of dizziness washed over her, and she fell back onto the pillows. "Who...who am I?" she whispered, her voice barely audible. The old woman's expression softened. "You are Queen Iduna, ruler of Arendelle. We've heard of your... remarkable daughters, Elsa and Anna." Iduna's eyes widened as memories flooded back. Her daughters, her journey, the shipwreck... She was alive, and she would find a way to return to them, no matter what lay ahead.