Fic: Jack in the Box (S&S)

This is a random fic I wrote sort of for the Genremixer meme back in December, but not, because it was actually just from a prompt that I generated from it in conversation with sovay about Iron: "Iron / Mercury / Emerald - hiding an injury & trust issues." I had trouble with editing it after and then couldn't give it the last pass because of being so ill for three and half months, which was ridiculous. /o\

Anyway, here it is, also for hc_bingo square "locked in a box" and allbingo square "Borage - bluntness."

Jack in the Box (2066 words) by thisbluespirit
Chapters: 1/1
Fandom: Sapphire and Steel
Rating: Teen And Up Audiences
Warnings: No Archive Warnings Apply
Relationships: Emerald & Iron & Mercury (Sapphire and Steel)
Characters: Emerald (S&S), Iron (S&S), Mercury (S&S)
Additional Tags: Community: hc_bingo, Community: allbingo, Genremixer, Trapped, Locked In, Jack in the Box, Blood and Injury, Trust Issues
Summary: Put three 'elements' in a box and what do you get?