So he met that guy, Abigail is his last name, and he stole his credit cards and used them. But Abigail liked him so forgave him and a relationship began as well as some sort of business dealings. Seems the Abigail guy really adores Strand but we can't be sure of Strand's motives. At any rate, he is trying to get back into Mexico to Abigail's home there. He had a guy, that guy that Nick went to get...the guy who didn't want his car messed up (Louis??), that is to take them into Mexico. They are at the border. The helicopters at the beginning are Mexican and keeping Americans out (as if the ZA isn't in Mexico and as if anyone would be worried about maintaining the border in the ZA...so kinda dumb). So Strand sent Nick in to get the Louise guy. Nick has learned that covering himself in walker guts/gore makes him blend in with them...and he kinda likes it since it is similar to the lifestyle he was living pre-ZA (drug addict). He sees himself in the walkers (hence his looking them right in the eye like). This is Nick's world while his family are struggling to gain footing.
Meanwhile, back on the yacht...
The guy that dumbo Alicia was talking to on the radio showed up with a pregnant lady and another bad guy. They pretended that preggers was in trouble by her having a cut on her thighs that bled down her legs to look like pregnancy trouble. They brought them aboard naively and chaos ensued. Madison got her head slammed by preggers chick. Others got tied up. Daniel was trying to get untied while Madison was running her mouth at preggers chick trying to keep her attention. Strand saw what was happening and went for his machine gun but Daniel had taken the ammo clip out of it, unbeknownst to Strand, so Strand said 'eff this' and jumped in kodiak boat to escape. Bad guys saw and shot at him, popping boat.
Meanwhile Alicia is making goo goo over the fella...is she playing him? I think so. She agrees to go with him.
The dad (Travis) is hot wiring the boat because Strand has the keys. He gets it started as new bad guys show up.
And Nick is on way back to boat with Louise fella.
New bad guys show up, including their leader but he's nicer than the ones there. He brings couple other bad guys/gals. He agrees to take Alicia and the dad (Travis) and they jump in little boat and leave all the others with 2 new bad guys/gals and the one really jerky guy from the original 3. We can assume they were going to assassinate them. But Nick and Louise show up and see the 2 bad folks on deck and they shoot them. Finally Daniel is free and he attacks the one bad guy inside the boat. They run some rod through him and Chris wants to kill him but they stop him. They keep him captive. Louise asks where Strand is and they tell him he was in kodiak that got shot up. So Madison goes out (on her own????) to rescue Strand who is close to dying in the cold water (border of Mexico, is the water that cold?).