Kirk opened his mouth to ask Spock what the matter was, the Vulcan’s eyes were wide and stared fixedly at Jim, who found himself unable to move and now noticed an uncomfortable heat coming from the stone, fitted between their palms and interlocking fingers.
He wanted to yank his hand back and couldn’t move. He couldn’t understand what the professor was saying, and neither could he speak.
Commander, he heard Spock say in his mind , I do not think this stone is inactive.
Not for us, apparently , Kirk thought back.
Source: All Our Tomorrows Come Today – Chapter 1, by flippyspoon – Multifandom [Archive of Our Own]
Adult, canon-divergence. I must say, I simply adore SNW fics about these two, especially when they integrate so beautifully into TOS.