会保留。
在 FLIP规则的第2大点提到：
When a card flips, if the new faceup side of that card has:
The same card type as the previous face, the card retains all attachments, status cards, and tokens.
A different card type from the previous face, all attachments, status cards, and tokens are discarded from the card.
主线密谋的A面和B面都是主线密谋，符合相同卡牌类型，应该保留token。