Derek Charles (Idris Elba) works for a finance company and is married to Sharon (Beyoncé). While Derek is at work, he greets temporary worker Lisa Sheridan (Ali Larter), who, believing Derek was flirting with her, attempts to seduce him. Derek repeatedly rejects her, but Lisa continues to pursue him, making sexual advances on him at the Christmas party. At one point, she follows him to his car and attempts to seduce him again with revealing lingerie and fishnet stockings, but Derek refuses again and forces her out of his car. Derek intends to report Lisa to his firm's human resource management, but learns that she has quit her job. Thinking that Lisa has given up, Derek is annoyed when he receives flirtatious emails from her. Derek and his workmates visit a resort for a conference, where he spots and confronts Lisa, who drink spiking his drink. Incapacitated, Derek is helpless when Lisa follows him into his hotel room. He confronts Lisa again the following day, and hours later discovers her lying naked in his bed after attempted suicide, and calls for medical help.