Black wind

then a strange vibration rippled up his arm and through his body just before his mind tumbled into a dark and empty void.
     
    *-.””
     
    Summer knew that THEY were at least twenty minutes from filing through the iron ring and that there would have to be another way to free her brother. Abandoning Dirk, she dove to the cavern floor, searching and groping for another tool or device, anything that would help break the manacle. But the flat, sandy bottom yielded nothing, just the row of mooring weights, one after the other. Kicking ahead with one hand guiding along the blocks of concrete, she touched a large chunk of concrete that had broken off one of the weights when it had been dropped too close to another. Gliding beyond the debris, she reached the last block, where she felt something flat and squishy like soggy leather fall away in her hand. A harder piece beneath it was narrow and curved, which she identified as the sole of a boot. A stick leaned against it, which she started to grab, then let go in horror. It was no stick, she could tell, but the femur bone of a skeleton that was still wearing the boot. Another victim of Kang’s savagery, the corpse had long ago been left chained to the anchor. Recoiling, she turned to swim back toward Dirk and bumped her head square into the fallen chunk of concrete. The broken piece was roughly square shaped, weighing about ninety pounds. She surveyed the block with her hands to get around it, then hesitated. It might be the answer, she decided, and was the best she could do under the circumstances.
    Kicking up for a quick breath of air, she dove back down and muscled the block off the floor and up to her chest. On dry land, she would have struggled mightily to lift the heavy weight, but underwater the block was more yielding. Moving quickly, she shuffled down the row of weights to her brother, fighting to keep the chunk balanced. Feeling rather than seeing Dirk, she turned and backed into her brother, pushing his body away from the block that held his left wrist. She noted apprehensively that his body gave way rather limply, unlike his normal stone like stature.
    Lining herself up with the mooring weight as best she could, she took a step and lunged forward, throwing herself and the broken chunk of concrete at the iron ring. In a slow-motion haze, Summer floated through the water with a slight ripple before the effects of gravity took over. But her timing was perfect. In the fraction of a second before her forward momentum was replaced by sinking gravity, the concrete chunk hit home on the iron ring. An audible clang, muffled by the water, told Summer that she was on target as she let go of the block. The rusty mooring ring, weakened just enough by the frantic filing, succumbed to the weight of the blow and snapped neatly off the anchor.
    Summer immediately grabbed Dirk’s arm and felt down to the wrist, which now dangled loosely. In a burst, she pushed her brother to the surface, took a deep breath of air herself, then towed his limp body to a small rock ledge, pulling him up and out of the water. She knelt by his side to administer CPR when his body suddenly stirred, his head turning to one side. With a groan, he expunged a small flood of water from his mouth and replaced it with a heaving lungful of air. Rising unsteadily to his elbows, he turned to Summer and gasped, “I feel like I drank half the river. Remind me to stick to bottled water next time.”
    The words barely gurgled out of his mouth when he leaned over and retched a second time, then sat up and rubbed his left wrist. Eyeing his sister, he was pleased to see she appeared unharmed and in good spirits.
    “Thanks for pulling me out,” he said. “How did you finally get the ring off?”
    “I found a loose chunk of concrete and flung it against the stanchion. Thankfully, I didn’t take your hand off in the process.”
    “Much obliged for that,” he muttered, shaking his head.
    After catching their breath, they rested for nearly an hour, slowly regaining their strength as Dirk purged the remaining water from his lungs, inhaled moments before Summer broke the iron grip that had nearly drowned him. What lit de sunlight that earlier wafted through the mouth of the cavern had long since vanished with nightfall, leaving them prone in the cave in near-total blackness.
    “Do you know the way out of here?” Dirk asked once he felt fit to move.
    “The mouth of the cave is less than fifty meters away,”