Retrace your steps. Then move into this passage. Bring down the sub mutant. Find health at the upper end of the passage.

Enter any of these two rooms. When you open fire guards in both rooms will be alarmed and may come at you from behind. Beware the bomb in the green room when you collect the chalices.

Then move north into this section. Finish with the guards in the hallway. Then enter the first room to the right (the kitchen). When you open fire enemies in the dining room to the north and the sub mutant in the little storeroom to the south will be alarmed. Engage in a heavy battle. Collect health chalices in the area. Beware the bomb by the door to the dining room from the hallway. The Super SS in the dining room will leave you a plasma gun. Find more plasma ammo in the little storeroom to the south.

Continue.