context: On a seaside pier in Los Angeles, friends Jenny Tate and Becky Morton decide to get their fortune told by Zela. Zela foretells that they will suffer a horrible fate, but they don't believe her and walk away laughing.
  That night, high-schooler Jimmy Myers is picked up on Mulholland Drive by his older sister Ellie, who has just returned from visiting her boyfriend, Jake Taylor. Jimmy had a run-in with some bullies and his crush, Brooke. Driving home, Jimmy and Ellie collide with an animal and another car. They attempt to rescue the other driver, Becky Morton, but an unseen creature slashes the siblings before it drags Becky off and rips her in half. When interviewed by police, despite Jimmy's belief that it was a wolf or dog-type animal, the official report credits it to a bear or cougar.
  Jimmy does research about wolves in California and starts to believe that the creature was a werewolf, sharing his thoughts with a disbelieving Ellie. Later, Ellie is surprised to find herself attracted to the smell of blood on a co-worker, but eases her concerns by touching a silver picture frame and not getting burned. Jimmy is becoming much stronger and more aggressive, as shown when a bully named Bo coerces him to join the wrestling team. He easily defeats three wrestlers, including Bo, and calls Bo out for constantly making gay jokes towards him, saying that Bo himself is repressing his own homosexuality.
  At a party, Jenny runs into Joanie, who is paying attention to Jake. Jenny leaves the party, while Jake and Joanie leave as the full moon rises. Jenny is torn apart in a parking garage by a werewolf â Zela's predictions for both Jenny and Becky have come to pass.
  Ellie starts to believe the werewolf hypothesis when she meets Zela, who warns about the effect the coming full moon will have. Jimmy proves they have been cursed when he holds a silver cake server and gets burned, discovering that the picture frame Ellie touched earlier was only stainless steel. Their dog, Zipper,[3] bites Jimmy, tastes his blood, becomes a lycanthropoid monster, and goes on a rampage. Realizing what's happening, Jimmy goes to warn Ellie with Bo, who showed up at their house to confess that he is gay and has feelings for Jimmy; Bo is flatly rejected, but still helps Jimmy.
  Ellie has deduced that Jake is a werewolf. He confirms it, but claims it wasn't he who attacked her and Jimmy. When a fourth werewolf attacks them, Bo and Jimmy try to help, but Bo is knocked out. The new werewolf turns back into Joanie, who was cursed after a one-night stand with Jake. She now wants revenge by killing all of the other girls Jake dates. When Jake refuses to let Joanie hurt Ellie, she knocks him out, then turns into werewolf form and starts attacking. Ellie and Jimmy fight her, and when the police arrive, the two draw her out by insulting her. The police open fire, apparently killing her in werewolf form, but she rises again as her head and heart are still connected. A policeman shoots her in the head, finally killing her. Bo is okay, but Jake has disappeared.
  Jimmy and Ellie return to a wrecked home. As Jimmy works to restore the power, Jake arrives. He reveals that he did bite Ellie and Jimmy, and wants to kill Jimmy (due to his Alpha male instinct) and have Ellie live forever by his side. She and Jake fight, but her werewolf form emerges sporadically while he has complete control over his, dominating the fight. Werewolf Jimmy joins in, climbing across the ceiling and biting Jake, allowing Ellie to stab and badly injure Jake with a silver cake server. Ellie decapitates Jake with a shovel and breaks the curse on the two siblings (and Zipper). They watch as Jake's body bursts into flames.
  Bo, Brooke and Zipper arrive at the house. Bo and Jimmy are now friends; Jimmy kisses Brooke and walks her home along with Bo. Ellie is stuck with the clean-up of the messy house.
question: Separating the brain from the heart according to the story is the only way to kill what?
answer: A werewolf