British songstress Charlotte O'Connor (better known simply as Charlotte OC) is once again proving her impeccable talent with the release of an emotionally gripping new single "Darkest Hour."

Ima Robot's Tim Anderson produced the soulful cut, which serves as the lead single from Charlotte's upcoming debut full-length, which is expected to be released next year on Harvest Records. Her single "On & On" was included in Variance's 100 Best Songs of 2015.

According to the singer, the new track is "about watching someone you love become a prisoner in a toxic relationship and feeling powerless because there is nothing you can do to help. The song is an introduction to what the album is about—love, loss and family."

Watch the video for "Darkest Hour" below.