Substance-dependent single mother Sin is trapped in a toxic relationship and must find a way to end it before it kills her.

In 1967 Detroit, Motown has hit its groove and the Poindexter siblings, Chelle and Lank, make ends meet by hosting parties in their basement. However, Lank and his friend Sly have dreams beyond the cellar shindigs—despite Chelle’s resistance. When Lank then brings home a mysterious white woman, the family’s simmering disagreements explode—as their streets erupt in riots—and life becomes a lot more dangerous.