Picking up where Crystal Gate left off, Four Rivers finds Alexis Zen caught between worlds, facing the ultimate decision-to accept her destiny or follow her heart. With the balance of good and evil titling, the architects of the universe return, forcing an ancient protector of Eden to open the gates, making the realm of Light vulnerable. As evil grows and searches for a way to bring back Alexis, the followers of Darkness begin to question their Master. While an old enemy comes out of the shadows, forcing Ben to reveal his true intentions to everyone, including the one he loves. Will this take Alexis off course or will she trust where her heart has led her? She must decide and evil must be stopped, leaving one problem: how do you bind the Devil?