The Fed is a central bank that was designed by rich bankers to stop people from rushing to the banks to get their money out, which is known as a bank run. It all started with one rich guy who was also a banker. He called in other bankers to solve problems with the bank runs. It eventually works out, but then more bank runs are still happening. They then go on a train to an island off Georgia, called Jekyll Island. They spend a week there and come up to an agreement of setting up a central bank that Woodrow Wilson later approves. That is how the Fed came to be.
The bankers went in secret so people don’t start freaking out more and running to the banks more. Also probably so they don’t get robbed or attacked for their money.