Complex sentence: When Nick saved her with the Templar treasure (a wooden stick with healing properties), she suffered a seizure and upon awakening, was very emotional and confused, leading Nick to wonder if Juliette had returned.
Split into simpler sentences: When Nick saved her with the Templar treasure (a wooden stick with healing properties), she suffered a seizure. Upon awakening, was very emotional and confused, leading Nick to wonder if Juliette had returned.