diff --git a/module/campaign/campaign_base.py b/module/campaign/campaign_base.py
index a49ba3595..2cff764fa 100644
--- a/module/campaign/campaign_base.py
+++ b/module/campaign/campaign_base.py
@@ -30,6 +30,8 @@ class CampaignBase(Map):
     def execute_a_battle(self):
         logger.hr(f'{self.FUNCTION_NAME_BASE}{self.battle_count}', level=2)
         logger.info('Running with poor map data.')
+        if self.fleet_2_break_siren_caught():
+            return True
         self.clear_all_mystery()
 
         if self.battle_count >= 3:
@@ -50,6 +52,8 @@ class CampaignBase(Map):
     def execute_a_battle(self):
         logger.hr(f'{self.FUNCTION_NAME_BASE}{self.battle_count}', level=2)
         logger.info('Using function: clear_all')
+        if self.fleet_2_break_siren_caught():
+            return True
         self.clear_all_mystery()
 
         if self.battle_count >= 3:
diff --git a/module/map/fleet.py b/module/map/fleet.py
index 9f3cd3a00..f3d21a8aa 100644
--- a/module/map/fleet.py
+++ b/module/map/fleet.py
@@ -158,7 +158,9 @@ class Fleet(Camera, MapOperation, AmbushHandler):
                     raise MapWalkError('walk_out_of_step')
 
                 # Arrive
-                if self.is_in_map() and (grid.predict_fleet() or grid.predict_current_fleet()):
+                if self.is_in_map() and \
+                        (grid.predict_fleet() or
+                         (walk_timeout.reached() and grid.predict_current_fleet())):
                     if not arrive_timer.started():
                         logger.info(f'Arrive {location2node(location)}')
                     arrive_timer.start()
diff --git a/module/map/grid_info.py b/module/map/grid_info.py
index 3a00d7776..5274c7013 100644
--- a/module/map/grid_info.py
+++ b/module/map/grid_info.py
@@ -47,6 +47,7 @@ class GridInfo:
 
     is_cleared = False
     is_ambush_save = False
+    is_caught_by_siren = False
     cost = 9999
     connection = None
     weight = 1
@@ -90,6 +91,7 @@ class GridInfo:
         dic = {
             'FL': 'is_current_fleet',
             'Fl': 'is_fleet',
+            'Fc': 'is_caught_by_siren',
             'MY': 'is_mystery',
             'AM': 'is_ammo',
             '==': 'is_cleared'
@@ -178,6 +180,8 @@ class GridInfo:
         self.is_fleet = info.is_fleet
         if info.is_current_fleet:
             self.is_current_fleet = True
+        if info.is_caught_by_siren:
+            self.is_caught_by_siren = True
         return False
 
     def wipe_out(self):
diff --git a/module/map/grid_predictor.py b/module/map/grid_predictor.py
index ab50d10ad..4a0b21a4f 100644
--- a/module/map/grid_predictor.py
+++ b/module/map/grid_predictor.py
@@ -68,7 +68,8 @@ class GridPredictor:
             if not self.is_enemy and not self.is_mystery:
                 if self.predict_dynamic_red_border():
                     self.enemy_type = 'Siren_unknown'
-            # self.caught_by_siren = self.predict_siren_caught()
+        if self.config.MAP_HAS_MOVABLE_ENEMY:
+            self.is_caught_by_siren = self.predict_siren_caught()
 
         if self.enemy_type:
             self.is_enemy = True
diff --git a/module/map/map.py b/module/map/map.py
index 97132f615..951ebe900 100644
--- a/module/map/map.py
+++ b/module/map/map.py
@@ -364,3 +364,25 @@ class Map(Fleet):
         self.fleet_1.clear_roadblocks(roadblocks)
         self.fleet_1.clear_all_mystery()
         return True
+
+    def fleet_2_break_siren_caught(self):
+        if not self.config.MAP_HAS_SIREN or not self.config.MAP_HAS_MOVABLE_ENEMY:
+            return False
+        if not self.map.select(is_caught_by_siren=True):
+            logger.info('No fleet caught by siren.')
+            return False
+        if not self.fleet_2_location or not self.map[self.fleet_2_location].is_caught_by_siren:
+            logger.warning('Appear caught by siren, but not fleet_2.')
+            for grid in self.map:
+                grid.is_caught_by_siren = False
+            return False
+
+        logger.info(f'Break siren caught, fleet_2: {self.fleet_2_location}')
+        self.fleet_2.switch_to()
+        self.ensure_edge_insight(reverse=True)
+        self.clear_chosen_enemy(self.map[self.fleet_2_location])
+        self.fleet_1.switch_to()
+        for grid in self.map:
+            grid.is_caught_by_siren = False
+        return True
+
diff --git a/module/map/map_base.py b/module/map/map_base.py
index 47f10de98..af80c57b3 100644
--- a/module/map/map_base.py
+++ b/module/map/map_base.py
@@ -253,6 +253,8 @@ class CampaignMap:
             MAP_7_2._find_path(node2location('H2'))
             [(2, 2), (3, 2), (4, 2), (5, 2), (6, 2), (6, 1), (7, 1)]  # ['C3', 'D3', 'E3', 'F3', 'G3', 'G2', 'H2']
         """
+        if self[location].cost == 0:
+            return [location]
         if self[location].connection is None:
             return None
         res = [location]