I do not know the floor plan.
If you are lucky, the shower plumbing runs through an inside wall, and the faucet side of the shower enclosure is secured against that inside wall. Look for an access hole, which may be covered either by a decorative, framed hanging, or by a plain piece of panel.
Otherwise, shower enclosures are usually made from two or three molded panels, which may be removed one at a time. Be careful to cut through caulk and sealant at the joints and along the wall and top, so the panel will not break when you pull it away from the wall.
I wish I could be more helpful. A couple of pics would help.