Impossible Accomplice is the solo debut of Annie Hart, co-founder of the dreamy keyboard/vocal trio Au Revoir Simone. Self-recorded while the band was on hiatus in stolen moments after her kids were asleep, its release comes on the heels of TV appearances by Au Revoir Simone on the 2017 revival of David Lynch's Twin Peaks. Those taken by the band's sweetened melancholy and nocturnal ambience will find common ground in Hart's own overcast, post-punk-influenced synth tunes. Heartache's at the forefront of songs like "I've Been Seeing You in My Dreams," which refers to a relationship in the past tense, and the unambiguous "My Heart's Been Broken." On the matter of being home-recorded, a few of the tracks, such as the spare "Softly" and bloopy "On the Way Down," capture unpolished performances that bring a raw quality -- aural and emotional -- to a style that can often be especially mechanical and detached. Here, quite to the contrary, "Softly," an intimate piano ballad at heart, ruminates with weary vocals and spare electronic keyboard, both softened by echo. Elsewhere, tunes like "Hard to Be Still," a dark dance track in the broad realm of Joy Division, and the flittering "My Heart's Been Broken" are lusher, with programmed drums, insistent bass, and layered vocals and keys. Part dark, punky synth pop and part brooding keyboard balladry, Impossible Accomplice is an exercise in efficiency in terms of sound and songwriting. In less than four minutes per song, it delivers simple tunes and direct messages with a limited but affecting soundscape befitting a late-night downpour.