Heat a large skillet over medium heat. Add the butter to the skillet. When the foaming subsides, raise the heat to high, and toss the shrimp into the pan. Cook the shrimp, without moving them, for 1 minute. Add the garlic and cook for 1 minute. Turn the shrimp over and cook for 2 more minutes. Remove the shrimp from the skillet.
Return the skillet to the heat and add the lemon juice.
Boil the liquid until slightly thickened, about 30 seconds. Add the spinach and saute for about 3-5 minutes or until wilted.
Add the shrimp back into the sauce.
Season with a little salt and pepper to taste and toss everything to combine it.
Divide the shrimp and spinach among the two wraps.