Caleb reached into the pocket of his ruined trousers and pulled out a small, silver key. It was attached to a chain around his neck.
"The vault key," he said. "Without this, he cannot bypass the final lock. But even with it, if he enters the wrong code, the explosives will trigger."
"Can you give me the code?" Elena asked.
Caleb shook his head. "It's not a simple code. It's a sequence of symbols that have to be entered in the correct order on a dial mechanism. I have to do it myself."
Elena looked at his legs, then at the dark corridor ahead. "How far is the vault?"
"Two levels down. Through the Archives."
Elena closed her eyes. The Archives. Where they had made love. Where the ceiling had collapsed on top of them.
"Okay," she said, opening her eyes. "Let's go."
They moved through
