In Sin, Blade must unravel a series of mysterious kidnappings. As he delves into the city's merciless underworld, an elaborate mystery unfold; at is heart, the SinTEK corporation and its leader, the ruthless and beautiful Elexis Sinclair. A Brilliant biochemist, Sinclair will stop at nothing to achieve her goal: a plan that could force the next step of human evolution-or spell doom for mankind.