Long Beach, California pulled nearly four billion barrels of oil out of the ground — and the ground answered by collapsing almost thirty feet, letting the Pacific Ocean pour over its own harbor. This is the true story of "the sinking city": the richest shallow oil field on earth, a man-made subsidence disaster that crushed its own wells and may have helped trigger a deadly 1933 earthquake, and the desperate engineering fix that is still running today. We trace it from the 1921 Signal Hill gusher and the vanished fishing village of Terminal Island to the four camouflaged oil islands that tourists still mistake for resorts. Watch to the end to find out why Long Beach can never, ever stop pumping the ocean back into the earth.