Robin's Liberation! Luffy vs. Lucci: Peak of the Decisive Battle

Summary

Freed from her sea stone handcuffs by Franky, Robin returns to her normal self. With no way back, the two decide to capture the ship Spandam had intended to use to bring Robin to the navy headquarters. The Buster Call ships arrive and start by shooting at the Tower of Justice, causing its dangerously positioned upper half to crush down into the waterfall. The resulting loud noise created reaches Luffy and Lucci beneath the Bridge of Hesitation. Anticipating that the Straw Hats would emerge through the underground passage, Lucci tears a hole into a wall of the underwater chamber, flooding it and the passage.