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"Black Smoke" follows Velora Gendron, a 23-year-old biochemist and engineering prodigy navigating grief, guardianship, and genius in the heart of Central City. After graduating from MIT at just seventeen, Velora lands her dream job at S.T.A.R. Labs-just before the fateful particle accelerator explosion that will change everything. With her younger brother Zyran in her care and her own traumatic past buried deep, Velora is finally beginning to rebuild a life. But something dark is waking up inside her. Something that doesn't remember love or logic. Something with her face-but not her soul. As Velora forges unlikely friendships with brilliant minds like Cisco Ramon and Hartley Rathaway, she must also confront the flickering blackouts and missing time she can no longer ignore. Because when Black Smoke rises, Velora might not be the one in control. A story of science, survival, sibling bonds, and the fractured self-Black Smoke is a slow-burn character-driven reimagining of The Flash, told through the eyes of a girl caught between the light she builds and the darkness she never meant to unleash.

You're one of Barry Allens 2 older sister given up for adoption what happens when you meet your brother or his best friend.

You're Barry Allen's little sister That's all I can tell with out giving out the whole story