Once Ace left Prime Heavenly Bank's branch, he quickly made his way through a remote alleyway. When he came out, he was wearing a new disguise, and his robes were also plain, no longer eye-catching.
After making sure no one had noticed him or followed him, he rented a room in one of the many hotels in the Northern Guardian Sect City and started analyzing the treasure blueprint on the fate map that he had made after paying a million TP.
As for the security vaults, Ace decided not to touch them because first, he needed to find their location, which was not close at all as far as he could tell upon sensing the Thief's Mark's general location.
The second difficulty was that he would probably need a deep understanding of space law to pinpoint the secret realm's location. He knew the bank might not leave those vaults without any protection, especially given the many treasures inside them.