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The dive team has been charged with clearing abandoned boats causing an eyesore and a navigational hazard in a picturesque part of a river. But disaster strikes, leaving the team stranded into the night on what is one of their most challenging jobs yet.

Work never stops for the diving team as they get a late call from a boat in peril. It's a needle in a haystack hunt in near zero visibility, and local leisure cruisers create imminent danger for the diver under the water.