Each player has 5 cards in front of them, drawn from the Main Deck: this is their Card Queue. These are the cards they are able to buy during the Buy Phase. Collectively, everyone’s Card Queues make up the Card Ring. During the Recovery Phase, the Card Ring rotates one to the left. This means that every player’s leftmost card goes to the player on their left, and they get a card from the player on their right. Here’s a picture of where the cards start:
And here’s where they end up:
This is difficult to communicate through text, but it becomes clear in play pretty easily. If there’s demand I may make a video demonstrating this.