The real news here is director Jeff Nichols, whose 'Take Shelter' with Michael Shannon and Jessica Chastain is must-see for cinephiles. That flick was elegant, subtle and very confidently executed. It's one of my favorites. In less capable hands 'Mud' could be a struggle to sit through but Nichols will (surely) deliver a fine movie. That Nichols also wrote the script for 'Mud' (as he did for Take Shelter) makes it even better.
'Mud' is about two teenage boys who help a fugitive evade capture and reunite with his girlfriend.