Poet Robert Burns perhaps summed up life’s surprises best when he wrote, “the best laid plans of mice and men go awry.” That about captures the story in the film, “Unexpected” when two people from very different backgrounds come face to face with the same situation: unexpected pregnancy. Filmmaker Kris Swanberg takes viewers along for the journey of Chicago public school teacher Samantha Abbott and one of her star pupils — Jasmine — as they deal with their pregnancies and each other. Along the way, characters make assumptions based on race and class. Unexpected premieres tonight at the Music Box Theater. Director and co-writer Kris Swanberg joins us for more on the story of “Unexpected.“