Alison Peters is a highly educated and ambitious lawyer who has always followed the rules and worked her way up the career ladder. However, despite her impressive qualifications, she finds herself working as a cashier at a grocery store due to the current state of the job market.
Struggling to make ends meet, Alison decides to rent out her basement on an online platform called MiCasaSuCasa.com. She soon gets a response from James Brewer, a charming and seemingly harmless man who explains that he has recently separated from his wife and needs a place to stay.
As Alison and James get to know each other better, their friendship quickly turns into a romantic relationship. However, as they grow closer, strange things start happening around Alison. People in her life begin disappearing, and she finds herself becoming the main suspect in a series of murders in her neighborhood.
To make things worse, Alison also has to deal with her creepy and manipulative boss, Brandon, who has been obsessed with her for years. When Brandon is found dead, the police become even more suspicious of Alison and begin to investigate her every move.
As the suspenseful and gripping story unfolds, Alison must prove her innocence and uncover the truth behind the mysterious killings before it's too late. With a gripping plot, strong performances, and a chilling soundtrack, The Killer Downstairs is a must-see thriller that will keep you on the edge of your seat from start to finish.