Two teenagers swim in an abandoned quarry. A property owner who leases his land to a mine operator enters without authorization to observe operations. Three youngsters wander onto cement plant property and get into a hot clinker pile. Along an ocean shore, strollers climb a pile of dredged sand. The teenagers drown. The lessor curious about mining is killed by a blast. The youngsters are severely burned by the hot clinker. The beach walkers die when the sand pile collapses on them.
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