Oscar Isaac’s secret is out…

The first official trailer for the 33-year-old Guatemalan and Cuban American actor’s latest project In Secret has just been released.

Originally called Thérèse Raquin, the period drama stars Elizabeth Olsen as Thérèse, the young sexually repressed heroine of Émile Zola’s 1867 novel who finds herself trapped in a loveless marriage to her cousin Camille (Harry Potter‘s Tom Felton).

When Camille’s artist pal Laurent (Oscar Isaac) comes to visit, adulterous sparks fly hurtling Thérèse down a path of obsession, love and madness.

Roadside Attractions has set a post-Valentine’s Day release for the film, on February 21, 2014.