Part 3/5:
Sebastian decides to be the first human subject for the experiment and injects the serum himself. After an agonizing transformation into an invisible being, he faces the consequences of his ambitions. Initially unsure of his new state, Sebastian struggles to cope with his invisibility, leading to severe psychological changes that manifest in disturbing behavior toward Sarah, a vet on the team.
Descent into Madness
As Sebastian's physical and mental health deteriorate, he becomes increasingly volatile and menacing. He exhibits violent tendencies, and the lab team struggles to reverse the effects of the serum. In a terrifying turn of events, he uses his invisibility to stalk and ultimately assault Linda, illustrating the moral and ethical implications of their experiment.