Betty asks Jughead for help in uncovering her lost memories.

Archie looks to get invulnerability and powers against Percival Pickens. Cheryl gives him a magical necklace to increase his strength, but she'll help him discover why Palladium is his weakness and how to defeat Percival.

Archie puts on the necklace and gets his powers back. He punches a punching bag to a bloody pulp.

Veronica gets a call that there will be a meeting held at her casino.

Nana Blossom deduces that Heather hasn't responded back to Cheryl's email. Cheryl is frustrated and buries her feelings.

Betty lashes out at Archie for his bloody hands. Archie is wearing Palladium because he wants to build up his strength and not look weak to Percival.

Veronica crashes the shareholders' meeting of the casino. Reggie leads the meeting stating that the board is upset that the casino hasn't made a profit and that Reggie was taken out of running. The board wants to sell their shares in the casino to make a profit.

Veronica gets the board to agree to hold on to selling for a few days.

Jughead has a tactic using comic books to get Betty to channel her lost memories. Jughead is brought to a dark shadow world with a desk of Betty comics.

Jughead reads the first comic to see a memory of Jughead and Betty kissing in her bedroom. The second memory is of Jughead comforting Betty about her worrying about being evil.

The third memory is of Hal telling young Betty that it wasn't wrong for her to kill her cat, Caramel. Present Betty thinks her father was grooming her at a young age to be a killer like him.

Archie is sweating and in pain from carrying the Palladium. Cheryl thinks Archie needs to ingest small amounts of Palladium for him to build an immunity.

Veronica confronts Reggie and Percival Pickens about their plot to take over Babylonium. Reggie owns up to calling the meeting and lining the selling of the casino. Veronica yells at Reggie until he starts having a nosebleed.

Archie takes another sip of the palladium drink. He collapses in the gym after jumping rope.

Dr. Curdle Jr confirms that the toxins in Veronica's body have increased.

Cheryl turns to a magic eight-ball for what to do about Heather. She calls Heather directly at the Greendale Public Library, but she hangs up the phone.

Archie weighs himself in the gym. He's lost a lot of weight.

Jughead ventures into another Betty: this one is of young Betty overhearing Hal and Alice talking about the serial killer gene. Present Betty is angry at Alice for keeping secrets and not speaking the truth.

Veronica calls Betty to grab drinks at the Whyte Wyrm. Archie joins them for drinks too. Veronica tells them about her new black widow powers.

Veronica is worried that if she gets close to anyone, they will die. Betty doesn't think Percival is the cause of their powers. Veronica discovers that alcohol doesn't have an effect on her.

Archie notices his hair has fallen out. Cheryl deduces that the iron in Archie's body is non-existent; he needs to replenish his iron or else his body will waste away.

Betty confronts Alice about her having the serial killer gene too and her keeping the secret about Hal.

Cheryl gives Veronica a selection of poisonous plants. Veronica wants to test if she's immune to poisons.

Betty wants Jughead to tap into Alice's mind about her memories of Hal. While  Betty confronts Alice at the news station, Jughead explores Alice's mind for memory about something hidden under the table floorboards.

Cheryl has discovered a spell that could turn the palladium into iron. The spell might make Archie immune to palladium. Archie wants to do the plan, but he wants one more night with Betty just in case.

Veronica reads a book about spiders and eats the poisonous plants.

Betty and Archie hook up.

Betty and Jughead start digging up the floorboards.

Veronica confirms that she's immune to poisons. She also deduces that her poison won't kill her, and when she's more heated/angrier, her poisons get more targeted. Veronica plans to be more in control of her emotions; Cheryl gives her her golden spider jewelry.

Betty discovers a dead body under the house. Alice recounts how Hal killed a deputy who was investigating Hal as a killer; Alice helped hide the body so that she wouldn't be framed or any harm done to their children. Alice wanted to protect Betty and get through the chaos; Alice was controlling and expected Betty to be the perfect daughter so that she could get through the evil.

Betty is mad at Alice because the evil didn't leave, even with all the control.

Alice and Cheryl conduct the ritual.

Reggie confronts Veronica with blackmail to get her out of the casino. Veronica takes a stand; she kicks him out of her office.

The ritual was a success. Archie is invulnerable and the palladium doesn't affect him anymore.

Veronica makes a speech at the shareholders' meeting at the Babylonium. A flashback is shown of Betty and Archie allowing Veronica to kiss Archie one last time.

Veronica performs "Toxic" by Britney Spears at Babylonium.

Jughead has flashes of memories back when he was dating Betty.

Heather arrives at Thornhill to see Cheryl.