^Exactly.
The beginning showed Sydney entering a casino, Tom as a valet driver taking her car into the garage, then breaking in to give her the code to a safe. Dixon was a man at the casino that convinced the pit boss that Sydney was cheating, they took her in a back room, she tranqued them, went to the vault. You see Tom opening the trunk to get something as well, but you don't see what. Sydney gets some computer, Tom drives her car out front. She takes it and proceeds to the ferry docks where her car is picked up by a giant magnet and held over the yards. Someone calls her and tells her to give them Mockingbird or else she'll die.
Then they go back and explain that Rachel is Mockingbird.
Then when they come back to the casino mission later in the episode, you find out that Rachel was in Sydney's trunk when she drove up, and Tom opened the trunk in the garage so that she could help crack the code to get Sydney in the safe. Then she went back into the trunk as Tom took the car out front for Sydney, so when Sydney was held above the docks and the men wanted Mockingbird, Rachel was actually in the trunk.