Langdon watched the phone plummet down and splash into the dark waters of the Nervión River. As it disappeared beneath the surface, he felt a pang of… - Dan Brown

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Langdon watched the phone plummet down and splash into the dark waters of the Nervión River. As it disappeared beneath the surface, he felt a pang of loss, staring back after it as the boat raced on.

“Robert,” Ambra whispered, “just remember the wise words of Disney’s Princess Elsa.”

Langdon turned. “I’m sorry?”

Ambra smiled softly. “Let it go.