The Most Dangerous Golden Bed

If you wonder why the golden bed in Texas millionaire Morgan's possession is said to be the most dangerous, it's because it's guarded by laser beams, immersed in a pool of high-strength sulphuric acid, and is shielded by a tank division and numerous other systems. Lupin can't back down from stealing it because Fujiko wants it for a love nest, so, on their third assault, Lupin, Jigen, and Goemon draw off the tanks and fighter planes, and attempts to use Morgan's own 45-inch gun himself. Now, how will he fare in the end?