Mhairi will be guest-starring as PC Jenny in BBC thriller Boat Story.
When two hard-up strangers, Janet and Samuel, stumble across a – wait for it – haul of cocaine on a shipwrecked boat, they can’t believe their luck.
So rather than hand it in to the authorities, the duo decide to form a partnership of sorts: they will sell the drugs, split the cash, and become rich beyond their wildest dreams – before parting ways once again.
Naturally, though, it isn’t quite that easy. Because not only do Janet and Samuel find themselves entangled with police, but they also become targeted by masked hitmen… and a sharp-suited gangster known only as ‘The Tailor’.
Will they survive long enough to take their cash to the bank? Only time will tell…
Boat Story begins on Sunday, 19 November at 9PM on BBC One.