Scottish Cup

PS: Comments held over until tomorrow, look forward to your opinions.

You pick up vul vs not, this:

EAST

—
—
A109xxx
Jxxxxxx

It’s the final of Scotland’s most prestigious event. John Holland who plays for England is one of your opponents. It’s towards the end, it’s all awfully close. So you pick up the above hand and see the auction proceed:

WEST….NORTH….EAST….SOUTH
………………………Pass…..1S
Dble……4C……….?

What’s your bid and plan with this lot?