Driven to vindicate himself, Jang Ho-jae pursues a woman shrouded in enigma. Meanwhile, at work, Chae-ok crosses paths with someone from a past life.

In pursuit of the very person he sought, Ho-jae unexpectedly finds himself rescuing Chae-ok from a shadowy pursuer. The encounter stirs within him a deeper curiosity about his own forgotten history.

Chae-ok consented to collaborate with Ho-jae in the search for Seung-jo, but their endeavor quickly plunged them into danger. Simultaneously, Chae-ok’s primal instincts began to manifest.

Ho-jae strives to assemble the fragments of his concealed history. Chae-ok uncovers a disturbing truth: the horrors of the past persist, casting a shadow over the present.

To rescue Chae-ok, Ho-jae makes a pivotal choice. With grievous wounds sustained, they must now fight their way through a perilous flight.

Following a public disturbance caused by a test subject, Jeonseung Biotech initiates a period of damage control. Circumstance compels Ho-jae and Chae-ok to directly challenge the company's leadership.

When a foe targets those dearest to Ho-jae, he throws himself into a desperate defense of them all. Can he withstand the savage onslaught and rescue Chae-ok?