If the only information that the plate umpire can add is, "you kicked the sh!t out of that call; he tagged him two feet from the base," then you are going to have to eat the original call (unless you're working D1 with instant replay). If this is the only issue (whether he was safe or out on the tag), then the crew is going to have to eat the call, or else the rest of the game will be spent listening, after every play, to pleas from the King Rats to "get help from your partner!" I can guarantee you that every steal/pickoff play the base umpire had the rest of the game would result in howls of "get help! get help!" should the crew have overturned the original call based merely on the plate umpire telling him "the tag clearly beat him."