Description taken from PC version of this game

This third-person adventure based on the classic Robert Louis Stevenson story is set after the death of Jekyll's wife, when the doctor has sworn off any further research and lives in a world of regret for the evil his studies have unleashed. When his daughter is kidnapped, however, he must again consider turning to the unbridled power of his darker half to secure her return. Players can take the role of Jekyll or Hyde in this 3D adventure, to seek the recovery of the missing girl through two separate storylines. ~ T.J. Deci, All Game Guide