Not that the entire fic isn't one big [[JustForPun Study in Tear Jerker]], but... (Prepare for one heart-rending moment right after another.)

* The eternal What-If for Sherlockians: What if Watson had known that Holmes survived Reichenbach? Right there and then? ...''Colonel Moran might have shot him in the heart, just as he does in '''''Fanfic/AStudyInRegret'''''.'' Sure, we like to think that if Holmes hadn't done the Great Hiatus, maybe [[EverybodyLives everybody would've lived]] - even Mary. But the fact that this is a ''very'' realistic portrayal of what might have happened if the Hiatus never happened... yeah, cue those waterworks.
* Maybe even more heartbreaking than Watson's death is Holmes's ''guilt'' over it, described in such vivid detail that it's easy to imagine that, even if he wouldn't get tortured nearly to death, his guilt might well have eaten him alive.
-->''Forgive me, John... forgive me...''
* Seriously, just try to read those [[FlashbackNightmare flashback nightmares]] stoically. Just try.
* Lestrade calls out "Doctor!" when Holmes wakes up for the first time out of captivity... then realizes what he's done when Holmes is confused at Watson's absence. Then Holmes realizes - Watson's death wasn't a dream, he isn't coming back, Lestrade knows it... The end result is that Lestrade's tears enable Holmes to cry again, and Lestrade holds him.
* Mary's ''very'' active involvement in the search for her husband and Holmes... only to discover that only one of them still lives. As Holmes's train of thought puts it: ''Just one of them was left...'' '''''the wrong one...''''' To top it off, she is [[BirthDeathJuxtaposition pregnant]] with the child that poor Watson wanted and will never have the chance to meet.
* Aside from ''A Study in TearJerker'', [=ASIR=] could also be called ''A Study in SurvivorGuilt'': it's been the defining trait of Literature/SherlockHolmes right up to the present. His best friend died - his best friend who was married and had a baby coming and ''Watson didn't know it'' - and Holmes lives on. Who ''wouldn't'' be dealing with serious SurvivorGuilt and [[DeathSeeker suicidal thoughts]]? What really sells the whole thing is that it could have so easily spiraled down into irritating {{Wangst}} ''but it doesn't''. Holmes's depression, guilt, and suicidal thoughts are rendered with chilling accuracy. More than that, however, there is just enough humor, enough rays of sunshine, to keep us afloat while we follow the Great Detective through the realistically long and painful process of finding the strength and the hope to live again.
* Any time Lestrade or Mary gives Holmes a WhatTheHellHero talk. Both have valid points but can present them rather bitingly, and Holmes's reactions are just heartbreaking.
* Holmes's conversation with Marcel. Marcel is so certain that the detective despises him - and it shocks and horrifies Holmes into his own private self-bashing. It's Woobie to Woobie, and you'd better have a box of tissues nearby because you'll most certainly need them.
* Holmes holding Mary when her guard is finally let down... [[TearJerker tear-jerking]] CrowningMomentOfHeartwarming.
** And, previously, the scene in which Mary had been the one to hold him while he cried himself to sleep.
* Holmes's failed attempt at suicide, and Lestrade talking him down. As said above, it's a scene rendered with chilling accuracy... and this troper was crying a river before she was finished reading.
* "Little brother." Marcel is leaving them and it's very much a "Nooo, don't go, Marcel!" moment for both the characters and the readers. They're saying their goodbyes, with Lestrade calling Marcel "son" in German, and then Marcel switches to French with Holmes and gives him the traditional "God go with you." And in replying, Holmes -- ''Literature/SherlockHolmes'' -- calls Marcel "little brother". Tear-jerker ''and'' CMOH, doggone it.
----