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Under Lock and Key was a virtual representation of one of Arno Dorian's genetic memories, relived by a Helix initiate through the Helix Navigator.


With the correct keyhole revealed, Arno only needed the key to the temple door.


As Léon jumped over the wall into the orphanage courtyard, Arno arrived.

  • Léon: (Hello!)
  • Arno: What have you been doing?
  • Léon: Nothing. Did you find the lock?
  • Arno: Yes. Now I need the key.
  • Léon: You know the soldier carrying the chest for the little commandant? I just saw him in the market.
  • Arno: (Thank you.) And I told you to stay here, remember?
  • Léon: "(Yes, sir.)"

Arno talking with Léon

As Arno left, so did Léon. Reaching the market, Arno found the lieutenant with his men.

  • Arno: There you are. Now lead me to the golden key.

Arno tailed the lieutenant.

  • Lieutenant: Alert me if you see anything unusual.
  • Soldier: Yes, sir.

The lieutenant entered a building and spoke with a raider.

  • Lieutenant: What do you have for me this time?
  • Raider 1: Silver, nearly enough to fill a chest.
  • Lieutenant: Give it to me.
  • Raider 1: The Commandant still suspects nothing?
  • Lieutenant: He is occupied in Paris. Your usual fee, plus a promotion.
  • Raider 1: Tres bon. A pleasure doing business with you.

As the lieutenant ran away, Arno chased and caught him.

  • Lieutenant: Guards! I will have you arrested!
  • Arno: You will do no such thing. Tell me the location of the chest containing the golden key or I shall reveal your thievery.
  • Lieutenant: I am merely seeking a harmless profit.
  • Arno: Like a rat hungry for apples?
  • Lieutenant: How did you know-
  • Arno: Surely the Commandant will find the comparison... enlightening.
  • Lieutenant: The chest is under guard within the caverns. Here.

The lieutenant gave Arno the key to the chest.

  • Arno: Merci. Now get out of my sight.

Entering the catacombs, Arno found the raiders' hideout. The raiders detected him.

  • Raider 2: Invader! We will find you!

Arno raiding the chest

Arno stole the raiders' loot, inciting a riot among several of them. This made his infiltration easier. He then killed an orator speaking to the raiders, causing a panic among those listening to him. Eventually, Arno found Napoleon's chest and unlocked it, taking the golden key within.

  • Arno: All that security for a key. What lies behind that door?

Arno escaped the catacombs.


By blackmailing Napoleon's lieutenant, Arno was able to unlock the commandant's chest. In it, he found the golden key to the temple door.


Assassin's Creed: Unity memories
Main memories
The Tragedy of Jacques de Molay
Sequence 1
Memories of Versailles - The Estates General - High Society
Sequence 2
Imprisoned - Rebirth
Sequence 3
Graduation - Confession - Fin de Siecle
Sequence 4
The Kingdom of Beggars - Le Roi Est Mort
Sequence 5
The Silversmith - La Halle aux Blés - The Prophet
Sequence 6
The Jacobin Club - Templar Ambush
Sequence 7
A Cautious Alliance - Meeting with Mirabeau - Confrontation - The Resistance
Sequence 8
The King's Correspondence - September Massacres
Sequence 9
Starving Times - Hoarders - The Escape
Sequence 10
A Dinner Engagement - The Execution
Sequence 11
Bottom of the Barrel - Rise of the Assassin - The Bastille
Sequence 12
The Supreme Being - The Fall of Robespierre - The Temple
Cooperative missions
Women's March - The Food Chain - The Austrian Conspiracy - Political Persecution - The Tournament - Heads Will Roll - Les Enragés - Danton's Sacrifice - Moving Mirabeau - Jacobin Raid - The Infernal Machine
Tithing Templars - Catacomb Raider - The Party Palace - Royals, Guns and Money - Smuggler's Paradise - Ancient History - It Belongs in a Museum
Paris stories
Tall, Dark Strangers - Flamel's Secret: The Monks - Flamel's Secret: Denis Molinier - Flamel's Secret: The Elixir of Life - Using the Ol' Noggins - Waxworks - Sewer Rat - À la Lanterne! - The Great Escapist - Critical Comedown - Scene Stealer - Devilishly Tricky - My Kingdom For Some Whores - De Sade's Reprieve - Sadistic Blackmail - The Cult of Baphomet - The Ritual of Baphomet - La Bande Noire - Iscariotte, the Giant - Headlining the Guillotine - A Fistful of Duelers - The League of the Crimson Rose - Return of the Crimson Rose - Crimson Sunset - Flying Boy - Carmalite Nuns - Stop the Presses! - Encyclopédie Diderot - Désirée Desired - Désirée Dismayed - Désirée Delighted - French Crown Jewels - Coat of Arms - Swiss Stash - Vicious Verses - Arm the People - "Escort" Mission - Cassini's Constellations - The Condorcet Method - A Romantic Stroll - Signaling Officer Murat - A Nice Chappe - Precious Correspondence - Constructing a "Close Shave" - Up in Arms - Marianne Returns Home - The Little Prince - Turtle, Snake, Bear, Paper, Scissors - Tapestry Thief - Cartouche's Memoirs
Café Théâtre missions
Explore the Café Théâtre - Auto-Da-Fé - Colette - Damsel in Seamstress - The Queen's Necklace - Foxy Renard
Social Club missions
Bridge Brigands - Marat's Missive - Let Them Eat Hay - Cat Food on a Hot Tin Roof - Hoarding Hostages - Café Procope - Roux's Remains - An Engaging Egyptologist - Artful Dodger - A Dramatic Exit - Breaking the Habit - Extortion Contortion - Chouan Riddles - Bara's Funeral - Retribution for a Rabble-Rouser - The Black Office - Betrayer of the Queen - Spiked Bourbon - Special Delivery - Smoky Yet Robust
Murder mysteries
Murder Foretold - Barber of Seville - The Body in the Brothel - Ancestral Vengeance - The Body Politic - Bones of Contention - The Assassination of Jean-Paul Marat - Hot Chocolate to Die For - The Hand of Science - The Decapitated Warden - The Death of Philibert Aspairt - The Red Ghost of the Tuileries - Cut the Middle Man - A Dash of Poison
Nostradamus Enigmas
Mercurius - Venus - Terra - Mars - Jupiter - Saturnus - Aries - Taurus - Gemini - Cancer - Virgo - Leo - Libra - Scorpio - Sagittarius - Capricorn - Aquarius - Pisces
American Prisoner - The Chemical Revolution - Killed by Science
Dead Kings
Sequence 13
Buried Words - The Book Thief - A Shadow from the Past - Raising the Dead - Under Lock and Key - A Crown of Thorns
Cooperative and heist missions
Last Rites - Holy High Rollers
Stories of Franciade
Last Will - A Royal Hide - The Unopened Rose - The Eyes of the King
Murder mysteries
Blind Justice - Equal Justice
Suger's Legacy
I - Nativitatis Et Mortis - II - Morbum - III - Diabolus - IV - Natura - V - Crux - VI - Noctis - VII - Dies
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