Carefully, turn back husk from corn.
Remove and discard corn silk.
Wash corn, allowing husk to get wet.
Add butter to soy sauce and brush corn with the mixture, then rewrap husk around corn.
Wrap cob in aluminum foil.
Grill 6 in. (15 cm) over heated coals for 10 to 12 minutes.
Remove foil and husk.
Season with salt and pepper.