The new trailer for upcoming thriller The Girl on the Train gives viewers more of a glimpse into the lives of the characters in the film, which tells the story of Rachel Watson and her involvement in a mystery surrounding missing woman Megan Hipwell.
"I used to watch this perfect couple and they were the embodiment of true love," says a forlorn Rachel, played by Blunt, as the trailer begins.
When Megan goes missing, Rachel tells her ex-husband Tom (Justin Theroux) that she's trying to help find her. Megan also worked as a nanny for the child Tom has with his new wife. "I don't think you're helping anybody," says Tom.
There are shots of a woman getting pulled back by her blond hair, snaps of different scenes at times aggressive and other times highly sexual, mixed with scenes from the investigation and Rachel's questioning. Viewers learn that Megan had a therapist and that her husband seems suspicious of him. All of the suspense builds as Kanye West's "Heartless" plays in the background.
The Tate Taylor-directed movie, based on the bestselling novel of the same name, hits theaters Oct. 7.
BEVERLY HILLS, CA - AUGUST 13: Actors John Krasinski and Emily Blunt attend HFPA Annual Grants Banquet at the Beverly Wilshire Four Seasons Hotel on August 13, 2015 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)
NEW YORK, NY - OCTOBER 08: Emily Blunt and husband John Krasinski pose at The Opening Night of the MTC production of Sam Shepard's 'Fool For Love' on Broadway at The Samuel J. Friedman Theatre on October 8, 2015 in New York City. (Photo by Bruce Glikas/FilmMagic)
TORONTO, ON - SEPTEMBER 11: Actors John Krasinski and Emily Blunt attend the 'Sicario' premiere during the 2015 Toronto International Film Festival at Princess of Wales Theatre on September 11, 2015 in Toronto, Canada. (Photo by George Pimentel/WireImage)
LOS ANGELES, CA - JANUARY 15: Actors John Krasinski (L) and Emily Blunt attend the 20th annual Critics' Choice Movie Awards at the Hollywood Palladium on January 15, 2015 in Los Angeles, California. (Photo by Tiffany Rose/Getty Images for Pol Roger Champagne and 1928 Prosecco)
LOS ANGELES, CA - JANUARY 15: Actor John Krasinski and wife actress Emily Blunt arrive at the 20th Annual Critics' Choice Movie Awards at Hollywood Palladium on January 15, 2015 in Los Angeles, California. (Photo by Jon Kopaloff/FilmMagic)
NEW YORK, NY - DECEMBER 07: (EXCLUSIVE COVERAGE) (L-R) Jon Hamm, Jennifer Westfeldt, John Krasinski and Emily Blunt pose at The Opening Night After Party for ''Elephant Man' on Broadway at Gotham Hall on December 7, 2014 in New York City. (Photo by Bruce Glikas/FilmMagic)
HOLLYWOOD, CA - NOVEMBER 08: Actor John Krasinski (L) and actress Emily Blunt attend the Academy Of Motion Picture Arts And Sciences' 2014 Governors Awards at The Ray Dolby Ballroom at Hollywood & Highland Center on November 8, 2014 in Hollywood, California. (Photo by Steve Granitz/WireImage)
VENICE, ITALY - SEPTEMBER 26: Emily Blunt and John Krasinski are seen on September 26, 2014 in Venice, Italy. George Clooney is set to marry his lawyer fiancee Amal Alamuddin this weekend in Venice where they met. (Photo by Robino Salvatore/GC Images)
BEVERLY HILLS, CA - JANUARY 13: Actors Emily Blunt and John Krasinski arrive at the 70th Annual Golden Globe Awards held at The Beverly Hilton Hotel on January 13, 2013 in Beverly Hills, California. (Photo by Jeff Vespa/WireImage)
SANTA MONICA, CA - JANUARY 10: Actors Emily Blunt and John Krasinski arrive at the 18th Annual Critics' Choice Movie Awards at The Barker Hanger on January 10, 2013 in Santa Monica, California. (Photo by Jeffrey Mayer/WireImage)
SANTA MONICA, CA - JANUARY 10: (L-R) Actors Emily Blunt, John Krasinski and Joseph Gordon-Levitt attend the Critics' Choice Movie Awards 2013 with Champagne Nicolas Feuillatte at Barkar Hangar on January 10, 2013 in Santa Monica, California. (Photo by Tiffany Rose/WireImage)
TORONTO, ON - SEPTEMBER 06: Actress Emily Blunt (R) and husband actor John Krasinski attend the 'Looper' opening night gala premiere during the 2012 Toronto International Film Festival on September 6, 2012 in Toronto, Canada. (Photo by George Pimentel/Getty Images)