Jacob Haendel, a talented 28-year-old chef from the affluent suburbs of Boston, developed stage 4 toxic acute progressive leukoencephalopathy (TAPL) from smoking heroin. TAPL is a fatal disease that damages your brain's white matter - cells that make a substance called myelin. This protects your nerves and losing it can make it harder for you to move, think, and feel sensations. Within a month he could no longer walk. Within 4 months he could no longer eat. Within seven months, he was locked-in: a comatose state you are conscious through. He is the only documented case to recover from this disease and is here to share his experiences.