Complex sentence: Muroto's subordinate and Kazuki's academy mate--and a platoon of Public Security agents make their way to the sewers and attempt to find Kazuki, without realizing that they are heading into a trap.
Split into simpler sentences: Muroto's subordinate and Kazuki's academy mate makes his way to the sewers with a platoon of Public Security agents. They attempt to find Kazuki, without realizing that they are heading into a trap.