While his mates opt for shore leave at a local hotel, Buffer (Jeremy Lindsay Taylor) is keen to connect with his new phone friend, Monica.
Awaiting her call, Buffer's attention is not only distracted by the Russian Special Forces tattoo on an aggressive passer by, but it leads him to be inadvertently locked in a container on a suspect barge, heading upriver.
Meanwhile, Commander Mike Flynn has recovered and is back in charge of the Hammersley, quickly reacting to a "mayday" call from the luxurious yacht owned by Ray Walsman.
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